Pretty Little Liars ( season 1 ) - wikipedia Pretty Little Liars ( season 1 ) Pretty Little Liars ( season 1 ) Season 1 DVD cover Starring Troian Bellisario Ashley Benson Holly Marie Combs Lucy Hale Ian Harding Bianca Lawson Laura Leighton Chad Lowe Shay Mitchell Sasha Pieterse Country of origin United States No. of episodes 22 Release Original network ABC Family Original release June 8, 2010 ( 2010 - 06 - 08 ) -- March 21, 2011 ( 2011 - 03 - 21 ) Season chronology Next → Season 2 List of Pretty Little Liars episodes The first season of Pretty Little Liars, based on the books of the same name by Sara Shepard, premiered on June 8, 2010 and concluded on March 21, 2011 on ABC Family. The show premiered to 2.47 million viewers and retained a regular audience of 2.5 million viewers during its summer run. The summer finale scored 3.07 million viewers, achieving a series high. The show went on hiatus and returned with its winter premiere on January 3, 2011, with 4.20 million viewers, becoming one of ABC Family 's top telecasts to date. Contents 1 Overview 2 Cast and characters 2.1 Main cast 2.2 Special guest cast 2.3 Recurring cast 2.4 Guest cast 3 Episodes 4 Development and production 5 Casting 6 Ratings 6.1 Live + SD ratings 7 DVD release 8 References Overview Best friends Aria Montgomery, Emily Fields, Hanna Marin, and Spencer Hastings grow apart when their clique leader and ' queen bee ' Alison DiLaurentis goes missing. A year later they all begin receiving messages from the mysterious `` A '' who threatens to reveal their darkest secrets. Aria has just returned from Iceland after a year or so with her family and still feels unable to forgive her father who cheated on her mother, who 's still unaware of it ; she also discovers that her new English teacher ( Ezra Fitz ) is the same guy she met and made out with at a bar the day before. Hanna is now the `` it '' girl of the school, along with former geek Mona Vanderwaal. Both girls indulge in shoplifting ; later, Hanna gets in trouble, forcing her mother to sleep with a detective for her release. Spencer has feelings for her sister 's fiancé ( Wren Kingston ). Emily befriends a girl named Maya St. Germain, who 's just moved into Alison 's old house. Later, Alison 's body is found buried in her old backyard. Realizing that ' A ' would n't be Alison, the girls began searching for clues. Their initial suspect was Toby Cavanaugh, who took the fall for an incident the girls refer to as ' The Jenna Thing '. After an attack from her boyfriend, Ben, Emily bonds with Toby. Emily begins to believe Toby may not be Alison 's killer, later confessing to him that she is a lesbian. Emily then starts going out with Maya, later developing a relationship with her. Emily later confesses to her parents about Maya and her sexuality, leading to a conflict between her and her mother. Maya was later sent to juvenile detention following the discovery of marijuana in her bag by Emily 's mother. Toby is arrested for Alison 's murder, but claims that he met Alison the night she disappeared to thank her for what she did. It is revealed that Jenna, Toby 's stepsister, forced him into a sexual relationship. Emily decides to hold a memorial for Alison ; however, the memorial was later destroyed, and a picture of her at its remains made her a suspect. Emily subsequently reveals her feelings towards Alison, after Detective Wilden tries to pin Alison 's murder on her. Meanwhile, Aria attempts to tell the truth about her father to her mother, but ' A ' tells her mother before she could. This led to her parents ' separation and her brother, Mike 's, change in behavior. Meanwhile, Melissa breaks up the engagement with Wren after seeing him kissing Spencer, leading to a conflict between the two sisters. Hanna attempts to make her boyfriend, Sean, forget the old her, but it backfires. The girls ' next suspect was Noel, after Hanna is hit by a car while spying outside Mona 's birthday party. Hanna witnesses Noel writing a message at the back of a car, owned by Ezra. Noel blackmails Ezra about his relationship with Aria, but is later framed by ' A ' for cheating on exams. Hanna and Sean later break up, after Hanna dances with Lucas at the dance - a-thon fundraiser ( as ' A ' demanded ). Ian returns in town, later reconciling and eloping with Melissa, to the surprise of the girls. Hanna later enlists Caleb 's help to work on Emily 's phone in order to talk to Maya. She eventually sympathizes with him after discovering his poor home life and develops a relationship with him. However, she breaks it off after she discovered that he was working for Jenna. Emily comes across Paige, a teammate of hers who began making homophobic remarks to Emily, though she later reveals herself as a lesbian. She and Emily later began dating, although Paige wants to keep things a secret. She and Emily later break up, and Emily dates Samara. The girls discover that Ian was the guy Alison was seeing the night she disappeared and suspect he was the one who killed her. After finding more clues, the girls, with Garett 's help, set up a plan to blackmail Ian, but this backfires when Ian sends someone to meet them in his place. Spencer is confronted by Ian at the church. He corners her at the bell tower, attempting to kill Spencer. However, a mysterious figure pushes Ian off the tower, presumably killing him. Cast and characters See also : List of Pretty Little Liars characters Main cast Troian Bellisario as Spencer Hastings Ashley Benson as Hanna Marin Holly Marie Combs as Ella Montgomery Lucy Hale as Aria Montgomery Ian Harding as Ezra Fitz Bianca Lawson as Maya St. Germain Laura Leighton as Ashley Marin Chad Lowe as Byron Montgomery Shay Mitchell as Emily Fields Nia Peeples as Pam Fields Sasha Pieterse as Alison DiLaurentis Special guest cast Sara Shepard as Ms. Shepard Recurring cast Keegan Allen as Toby Cavanaugh Tammin Sursok as Jenna Marshall Janel Parrish as Mona Vanderwaal Torrey DeVitto as Melissa Hastings Ryan Merriman as Ian Thomas Chuck Hittinger as Sean Ackard Tyler Blackburn as Caleb Rivers Brendan Robinson as Lucas Gottesman Brant Daugherty as Noel Kahn Lesley Fera as Veronica Hastings Cody Allen Christian as Mike Montgomery Lindsey Shaw as Paige McCullers Bryce Johnson as Darren Wilden Diego Boneta as Alex Santiago Guest cast Julian Morris as Wren Kingston Nolan North as Peter Hastings Jim Titus as Officer Barry Maple Yani Gellman as Garrett Reynolds Eric Steinberg as Wayne Fields Jill Holden as Mrs. Welch Amanda Schull as Meredith Sorenson Carlson Young as Amber Victorino Parker Bagley as Jason DiLaurentis Anne Marie DeLuise as Jessica DiLaurentis Roark Critchlow as Tom Marin Tilky Jones as Logan Reed Patrick J. Adams as Hardy ^ Note 1 : Bianca Lawson is credited as a series regular up until episode 13. From episode 14 onwards she is no longer credited. ^ Note 2 : Nia Peeples is credited as a series regular in episode 1. From episode 2 onwards she is credited as a guest star. ^ Note 3 : Sasha Pieterse is credited as a guest star in episode 1. From episode 2 onwards she is credited as a series regular. Episodes See also : List of Pretty Little Liars episodes No. overall No. in season Title Directed by Written by Original air date U.S. viewers ( million ) `` Pilot '' Lesli Linka Glatter I. Marlene King June 8, 2010 ( 2010 - 06 - 08 ) 2.47 Friends Aria Montgomery, Emily Fields, Hanna Marin, and Spencer Hastings grow apart when their clique leader Alison DiLaurentis goes missing. A year later they all begin receiving messages from the mysterious `` A '', who threatens to reveal their darkest secrets. Aria has just returned from Iceland after a year with her family and still feels unable to forgive her father who cheated on her mother, who 's still unaware of it ; she also discovers that her new English teacher ( Ezra Fitz ) is the same guy she met and made out with at a bar the day before. Hanna is now the `` it '' girl of the school and indulges in shoplifting, which gets her in trouble and forces her mother to sleep with a detective for her release ; Spencer has feelings for her sister 's fiancé ( Wren Kingston ) ; Emily befriends a girl named Maya, who 's just moved into Alison 's house. They soon suspect that Alison is `` A '', until her body is finally found. There 's a funeral, at which the quartet are seated together and they all get worried after seeing Jenna, a classmate who was blinded in an incident involving the four girls and Alison ( multiple times through the episode, there were references to the `` Jenna thing '' ). The girls receive one more text : I 'm still here bitches. And I know everything - A. `` The Jenna Thing '' Liz Friedlander I. Marlene King June 15, 2010 ( 2010 - 06 - 15 ) 2.48 With Jenna 's return to Rosewood and to school, the girls are forced to face an unpleasant incident from their past in which with Alison they played a terrible prank ( by setting a fire on a garage ) on Jenna 's step - brother Toby which went horribly wrong, leaving Jenna blind. They thought this dark secret has been sealed forever but `` A '' wo n't let them forget it. Meanwhile, questions about the night of Alison 's disappearance begin to arise, as the events of that fateful night continue to haunt them. Aria applies for the transference from Ezra 's class but her application is rejected. They later make out in his car after Ezra drives by Aria after she gets caught in the rain. Spencer 's sister breaks up with her fiancé when she catches him kissing Spencer. Hanna 's mom is still reluctantly involved with the detective Wilden, who still does n't have faith over the girls ' description of that night. Maya has moved in with Emily for few days and Emily feels herself attracted to her, which makes her feel guilty because she has a boyfriend ( Ben ). Aria 's father wants to resolve the issues between them ; which actually works out positively. `` To Kill a Mocking Girl '' Elodie Keene Oliver Goldstick June 22, 2010 ( 2010 - 06 - 22 ) 2.74 The girls try to pay tribute to Alison 's memory, but they are still faced with unresolved issues. Toby, Jenna 's stepbrother, has come back to school. Aria has an unpleasant encounter with her father 's former mistress. Spencer faces a vengeful Melissa after her kiss with Wren. Hanna tries to get Sean to forget the ' old Hanna '. Toby and Ben, Emily 's boyfriend, have a fight and Emily breaks up with Ben. Emily and Maya get closer and Spencer copies her sister 's essay and puts it as her own when she ca n't think of anything to write. The girls realize that leaving the past behind is much harder than they first thought. ' A ' ending : ' A ' listens to jazz music as they print copies of the pictures of Emily and Maya in the Photo Booth. `` Can You Hear Me Now ? '' Norman Buckley Joseph Dougherty June 29, 2010 ( 2010 - 06 - 29 ) 2.09 The girls block e-mails and text messages from all unknown users in an attempt to stop `` A, '' but their problems are far from over. One girl receives a surprise visit, while another receives a surprise gift in class. Hanna meets her dad after a while and realizes that he has a fiance. Aria tries to tell her mom about her dad cheating on her before they went to Iceland, but it looks likes `` A '' beats her to it. Emily is still confused about Toby and her kiss with Maya. Spencer 's Russian article ( the one she copied from Melissa ), gets entered in a contest and she is still confused about Wren. And just when things could n't get any more complicated, the girls find out that trying to keep `` A '' away comes with a price. Spencer arrives home with Hanna to find that somebody has been in her house, leaving a grave on her table and a message on her mirror. 5 5 `` Reality Bites Me '' Wendey Stanzler Bryan M. Holdman July 6, 2010 ( 2010 - 07 - 06 ) 2.62 Aria forgets her cell phone in Ezra 's apartment, and after he reads a message from A, he decides to break up with her ( thinking that she told someone ) rather than risk being fired. Hanna has to work in a dentist office to pay for the damage she did to Sean 's car and gets some new information from A about one of her friends. She sees Jenna at the office building wearing the same lipstick, just like the writing on Spencer 's mirror. Emily hides her budding friendship with Toby due to the girls ' suspicion about him, hurting his feelings. Spencer 's father tells her to throw a tennis match against a possible client and his daughter. Ella deals with her husband 's cheating, which makes things worse for Aria and Mike. 6 6 `` There 's No Place Like Homecoming '' Norman Buckley Maya Goldsmith July 13, 2010 ( 2010 - 07 - 13 ) 2.69 Emily accepts an offer to go to Homecoming with Toby, despite Hanna presuming she wanted to go with Maya. Spencer gets ready for Homecoming with Alex as her date, but will things go as she planned them to ? Hanna meets Lucas when she joins the ' Real Love Waits ' celibacy club with Sean. Aria is still reeling over her breakup with Ezra and the tension between her parents. Spencer asks Hanna to collect Jenna 's psychotherapy file, with a shocking twist. ' A ' ending : ' A ' sprayes over the town sign and changes the population census to one less number. 7 7 `` The Homecoming Hangover '' Chris Grismer Tamar Laddy July 20, 2010 ( 2010 - 07 - 20 ) 2.55 Aria 's brother, Mike, does n't take it very well that his parents are separating, which leads to him fighting in school after his mother decides to not watch his game, as Mike and Aria 's father will be there. Emily decides to try dating Maya. Hanna and Sean make - up, but she 's more interested in Lucas. Spencer and Alex have some fun in the country 's club kitchen. At last, A has still one more creepy message to deliver to the girls, which makes them assume that Toby might be dead. Sara Shepard, writer of the Pretty Little Liars book series, makes a special appearance in the episode as a substitute teacher at Rosewood High School. ' A ' ending : ' A ' fishes up the documents the girls threw in the river, containing files of Toby Cavanaugh. 8 8 `` Please, Do Talk About Me When I 'm Gone '' Arlene Sanford Joseph Dougherty July 27, 2010 ( 2010 - 07 - 27 ) 2.52 As new evidences about the day that Alison died comes to the surface, Spencer gets some damaging information from Alison 's brother, Jason. Aria agrees to go out on a double date with Sean 's friend Noel, and the evening takes an interesting road once Aria realizes that Noel is way more than just a pretty face. Emily and Maya 's relationship blossoms when Emily asks Maya on a date. Due to the Marin 's financial problems, Hanna 's credit card gets declined, so she decides to put a lot of her old clothes and handbags up for auction online with the help of new ally Lucas. Meanwhile, the girls begin to prepare themselves for Alison 's memorial day, but once they find out that Jenna will be the one to deliver a speech about Alison, they all get scared. Later that night, a mystery person comes out and destroys Alison 's memorial. 9 9 `` The Perfect Storm '' Jamie Babbit Oliver Goldstick August 3, 2010 ( 2010 - 08 - 03 ) 2.55 A terrible storm comes to Rosewood, and all of the students are trapped in school. Emily reveals a secret after she 's accused of killing Alison. Just as Aria is about to give dating Noel a chance, Ezra returns. Byron leans on Ashley for advice as his relationship with Ella only gets worse. Meanwhile, Spencer discovers something that her mother has been keeping from her. And at the end of the episode, Lucas tries to tell Hanna something. We see his shoes are dirty, suggesting that he was at Alison 's memorial. ' A ' ending : ' A ' sends a file containing video footage of Alison the day she disappeared, to Rosewood Police Department. 10 10 `` Keep Your Friends Close '' Ron Lagomarsino I. Marlene King August 10, 2010 ( 2010 - 08 - 10 ) 3.07 When new evidence leads the FBI to believe that Toby killed Alison, he tries to tell Emily his side of the story yet she rats him out. Spencer tries to mend fences with her sister Melissa, just as her ex-boyfriend Ian returns. Emily 's dad comes back from his deployment and her mother was sent a picture of Emily and Maya kissing. Aria begins to develop feelings for Noel, which complicates her relationship with Ezra even more, until Ezra admits his feelings for her and they kiss with Hanna watching as she keeps post to find out who `` A '' is. Ashley 's financial problems are bringing her to the brink. Meanwhile, the girls go `` glamping '' for Mona 's birthday in hopes of closing in on `` A '', but when `` A '' 's identity is revealed to Hanna, `` A '' runs her over with a car before she gets a chance to tell the others. ' A ' ending : ' A ' looks at the video of Alison at the Kissing Rock and it is revealed that Ian Thomas was with her. 11 11 `` Moments Later '' Norman Buckley Joseph Dougherty January 3, 2011 ( 2011 - 01 - 03 ) 4.20 Hanna is now in the hospital and remembers who A is. She tells the girls it was Noel Kahn because she saw him write ' I see you ' on the back on Ezra 's car while Aria and Ezra were kissing. But the girls are starting to question if the person who killed Alison and ' A ' are two different people. Meanwhile, Melissa and Ian elope. Also Lucas admits his feelings for Hanna, but is both angry and heartbroken when she tells him she only likes him as a friend, and tells her that she deserves a better boyfriend than Sean. The girls find out that ' A ' wrote on Hanna 's leg cast which is, `` Sorry for losing my temper, my bad, '' which could have been anyone who entered Hanna 's room while she was asleep. Also, Emily finally has enough courage and comes out to her parents ; her father accepts it because she 's his daughter and he loves her, but her mother has a much harder time accepting it. ' A ' ending : ' A ' burns the part of the tree which had the carving of Alison and Ian 's name on it. 12 12 `` Salt Meets Wound '' Norman Buckley Oliver Goldstick January 10, 2011 ( 2011 - 01 - 10 ) 3.21 Hanna mends in a wheelchair upon her release from the hospital, and Mona throws a surprise party for her. At the end of the party, Ashley and Hanna realize someone has stolen the bank loan in the lasagna box. Meanwhile, Aria is struggling to tell Ezra that Noel knows about their relationship ; Spencer 's romance with Alex hits a snag and Emily invites Maya to dinner with her family ; Surprises haunt the Liars as `` A '' continues the game. It is also revealed that Lucas destroyed Alison 's memorial and Jenna was the one who told the police where Toby was. ' A ' ending : ' A ' puts the hundred dollar bills into a clown piggy bank. 13 13 `` Know Your Frenemies '' Ron Lagomarsino I. Marlene King January 17, 2011 ( 2011 - 01 - 17 ) 2.99 `` A '' makes Hanna eat cupcakes, making her think about being bulimic again. `` A '' saves Aria 's and Ezra 's relationship. Emily 's mom finds drugs in Maya 's bag, and brings the bag to Maya 's parents, thus sending her to juvie. Spencer unravels the Ali murder, thinking Ian is the killer. She also finds out that her sister, Melissa, is trying to get pregnant. In the end, a video of Ali and Ian is shown, the camera falls, leaving the watchers hearing someone choking someone. A body is thrown to the ground, Ali 's hand appearing in front of the screen. Her name bracelet brings the girls to think Ian killed Ali. 14 14 `` Careful What U Wish 4 '' Norman Buckley Tamar Laddy January 24, 2011 ( 2011 - 01 - 24 ) 3.17 As the school gets ready for the dance - a-thon, Aria, Emily, Hanna and Spencer have more on their minds than raising money for the school trip to Washington, D.C. Hanna and her mother are having a financial crisis, but when ' A ' leaves her an offer that would potentially break Lucas 's heart but get her out of money troubles, will she be able to refuse ? Emily can only think of Maya and is desperate to speak to her -- so much so that she enlists the help of Caleb, the new bad boy in the school. And as an important piece of property goes missing, Spencer finds being in close quarters with her new brother - in - law, Ian, more difficult than ever. Meanwhile, Aria 's former babysitter, Simone ( Alona Tal ), comes back to town for a surprise visit. But what should be a happy reunion quickly becomes a nightmare for Aria when Simone sets her sights on Ezra. ' A ' ending : ' A ' receives their black jacket and gloves from Ella Montgomery at the dance - a-thon. 15 15 `` If at First You Do n't Succeed, Lie, Lie Again '' Ron Lagomarsino Maya Goldsmith January 31, 2011 ( 2011 - 01 - 31 ) 3.19 The girls try to resume a sense of normalcy in their lives, but even the simple tasks of dating and extra-curricular activities meet with strife. Emily must deal with a jealous teammate ( Lindsey Shaw ) who is threatened by Emily 's return to the pool, as Aria and Ezra plan their first date out in the open. And Hanna is still stuck playing `` A 's '' game, but the next hurdle might just have complications for another Liar. With `` A '' pulling the strings and making matters worse, will the girls be able to weather the storm and lie their way out of it, or will they have to face the ugly truths ? Meanwhile, Spencer turns to Ali 's brother, Jason, for information about the night they believe Alison died, only to have to face part of her unpleasant past with Ali. ' A ' ending : ' A ' visits the bead lady and receives a cup of tea as the lady tells her she has done what ' A ' told her to do. 16 16 `` Je Suis Une Amie '' Chris Grismer Bryan M. Holdman February 7, 2011 ( 2011 - 02 - 07 ) 3.14 A crucial swim meet for the Rosewood Sharks is the setting for Aria, Emily, Hanna and Spencer to experience a lot of turmoil. Emily and Paige go for round two, as they are pitted against each other to compete for the anchor leg of the big race. And Caleb calls in his favor with a guilty Hanna as she tries to deter Aria from asking too many questions about Ella 's ticket to the museum opening. Meanwhile, Spencer takes on the task of tutoring Toby in French to try to get some answers. ' A ' ending : ' A ' listens to a French tutorial while arranging different objects. 17 17 `` The New Normal '' Michael Grossman Joseph Dougherty February 14, 2011 ( 2011 - 02 - 14 ) 2.35 Aria 's dad has a parent - teacher interview with Ezra. Meanwhile Toby and Spencer start to get closer. And Spencer and the girls realized what the note means. Hanna 's mom gets in trouble when Mrs. Potter 's alleged nephew tries to access Mrs. Potter 's safety deposit. Paiges ' father shows up at the school and makes a huge scene in the school cafeteria, demanding an answer to why Emily is the swim team captain and not his daughter. He thinks Emily is getting special treatment because she is gay. Later, when Emily is in her car, Paige shows up and kisses her. She quickly leaves saying, `` Do n't tell. '' ' A ' ending : ' A ' places flowers on top of Mrs. Esther Marie Potter 's grave. 18 18 `` The Badass Seed '' Paul Lazarus Oliver Goldstick & Francesca Rollins February 21, 2011 ( 2011 - 02 - 21 ) 2.90 The girls are doing a play together ; when they finish rehearsing they find a trophy with blood on it, making them think its Alison 's blood... but it turns out to be rat 's blood ; they all revisit memories about when they crashed a frat party ; Aria uses the play to get closer to Mr. Fitz ; Hanna and Caleb kiss ; the police come after the girls at the end with some questions. ' A ' ending : Four cages are shown in ' A 's ' house with a rat in each of them with the name of the Liars. The cage with the rat named Spencer is missing. 19 19 `` A Person of Interest '' Ron Lagomarsino I. Marlene King & Jonell Lennon February 28, 2011 ( 2011 - 02 - 28 ) 2.69 After a shocking revelation from the police, the spotlight is turned on the four little liars who look to be crying wolf. But with everything pointing to Ian, how could the girls be wrong ? Or could this be just another game `` A '' is playing with them ? With the cops now demanding answers from Aria, Emily, Hanna and Spencer, will the girls come clean about `` A, '' or are some secrets better left buried ? The police take a special interest in Spencer, who accuses Ian of murder. The truth surrounding what happened in Hilton Head is revealed. Meanwhile, secret relationships take a toll on some of the Liars while others blossom. Hanna loses her virginity to Caleb. Love is not for the faint of heart. At the end of the episode Toby and Spencer kiss. When she gets home the cops are there, the secret is revealed that her and Ian were hooking up. ' A ' ending : ' A ' watches a footage of the girls receiving ' A 's ' texts while eating popcorn, and replays the video. 20 20 `` Someone to Watch Over Me '' Arlene Sanford Joseph Dougherty March 7, 2011 ( 2011 - 03 - 07 ) 2.95 As the heat is turned up on the suspicions surrounding Spencer, the girls must come to the reality that they are n't the only ones hiding secrets in Rosewood. Emily and Aria overhear Caleb arguing with someone on the phone about Hanna. They tell Hanna they believe it was a girl, and soon they see Jenna with a pendant Hanna thought Caleb intended for her -- and which turns out to be a flash drive. Hanna confronts Caleb, who says he 's been spying for Jenna and she kicks him out of the house for good. Later, Hanna runs into Jenna in the school restroom and slaps her. Jenna cries, and this is the second time we see her face. Aria 's mom finds out Aria is dating someone, and tries to find out whom. Aria 's dad soon joins in the investigation and nearly finds out about Ezra, until Aria 's parents fight over whether they should pry into Aria 's life, reversing their reconciliation. Ian encourages Spencer to run away, and Toby asks her not to. Spencer 's mother tells Spencer that the police have new evidence against her, but that she thinks Spencer is innocent. Emily and Paige reconcile after Paige reconciles herself to being gay. ' A ' ending : ' A ' smashes a glass heart with Hanna 's name on it, and puts it in a box with a letter to Hanna. 21 21 `` Monsters in the End '' Chris Grismer Oliver Goldstick March 14, 2011 ( 2011 - 03 - 14 ) 2.94 Everyone has something to hide -- whether it be a secret romance, who they really are and what their true intentions are. For Mr. Fitz, he 's hiding an old romance with a girl he met in college, Jackie Molina, whom he had been engaged to but never married, which makes Aria suspicious and Hanna aids her in creating a fake account and friending her to find out more about her. Paige gets hurt when Emily cancels a date with her to the Founders Festival ; Emily is tired of being Paige 's secret. Emily finds a storage key, the one Jenna has been looking for, in a snow globe Ali gave her after she admitted Emily was the `` only person she could be completely honest with ''. Caleb comes to the Marins ' home to drop off a letter for Hanna and let Ashley know that he is leaving Rosewood to go to Arizona for good, but when Ashley suggests he deliver the letter to Hanna at the festival in person, Mona has her own way with the letter. Spencer finds out some more information about Ian, Melissa, and Alison at Hilton Head while preparing for the festival ; and a meet with Toby at the festival at night goes wrong when someone traps Spencer in a scary funhouse. However, Ian rescues her, but when they start to leave, Spencer runs up to Toby and they lock each other in a loving embrace and kiss, to which Spencer 's family sees this. Garrett confronts Ezra ( after seeing Aria leave his place ) and sees the props Aria and Ezra used for a couple photo ( out of a fit of jealousy about Jackie and Ezra 's old couple photo in Italy. ) The girls visit the storage room, where they see Ali 's old lunchbox with a flash drive in it. They realize that someone has been recording a video of and watching Alison, Aria, Emily, Spencer, and Hanna all this time and wonder who could have been spying on them. ' A ' ending : ' A ' swipes the key from underneath Ezra 's doormat. 22 22 `` For Whom the Bell Tolls '' Lesli Linka Glatter I. Marlene King March 21, 2011 ( 2011 - 03 - 21 ) 3.64 Now that Aria, Emily, Hanna, and Spencer are in possession of the information that Alison left them, the girls decide that it 's time to finally put an end to `` A '' and the mystery surrounding their friend. They turn to Jenna, finding out what Alison spoke to her about in the hospital ; how she threatened Jenna with the video if she did n't keep their secret. Hanna is confused when she is told by her mother that Caleb was going to the festival to give her a letter before he left town. Mona tries covering it up but when she is having a mysterious phone call about Hanna 's well - being, Lucas tells her she 's wrong and Hanna deserves to be happy. Spencer buys a prepaid phone to tell Ian that they found the video and to come to the park with $10,000. Aria 's mother has a get together with all of the teachers, but Aria is shocked to see Ezra 's past love show up. Spencer is shunned when she cracks a joke about Melissa 's baby 's christening, but regrets it since the baby is just Ian 's spawn, not Ian. Jenna is shown worrying about the repercussions of the video getting out into society, and it is revealed that she is secretly dating Garret, who consoles her and promises to keep her safe. When Melissa ( stood up at the church by Ian ) senses something wrong and can not find her phone, Spencer offers to drive her to the church to find her phone, but they get into a car accident, leaving Melissa 's baby in danger. After Emily, Hanna, Aria, and Garret go to the park to find Ian, a messenger shows up giving them the money instead of Ian. Back at the church searching for Melissa 's phone, Spencer finds Ian instead. He chases her up the stairs and attacks her, revealing that it was Ian who said he pushed Alison knocking her unconscious, even though Spencer knows Alison died of suffocation. Ian pushes Spencer but she latches onto his leg, screaming for help. A hooded figure comes up to them, and Ian questions why he / she is there. The figure pushes Ian, making him plummet to his death. When the police show up to get the body, they think the girls are lying because Ian is nowhere to be found. But without certain proof, they can not justify that he was actually there attempting to murder Spencer. As the girls walk out of the church, still shaken about the near death experience, they receive a text from A stating, `` It 's not over until I say it is. Sleep tight while you still can, bitches. - A. '' Development and production Originally developed as a television series by book packaging company Alloy Entertainment, the idea was described as `` Desperate Housewives for teens. '' Alloy met with author Shepard, and gave her the property to develop into a book series. With Alloy and Warner Horizon interested in producing a Pretty Little Liars television series for years, it was first planned for The WB in 2005 with a different writer. The first novel was published by HarperTeen in October 2006. In June 2008, Alloy noted that it was developing a Pretty Little Liars television pilot for ABC Family. The novels are being adapted for television by I. Marlene King. Casting ABC Family began casting for a Pretty Little Liars television pilot in October 2009. Lucy Hale was cast as Aria Montgomery in the project, followed by Troian Bellisario and Ian Harding ( as Spencer Hastings and Ezra Fitz, respectively ) in November 2009. In December 2009 The Futon Critic confirmed the casting of Ashley Benson as Hanna Marin and Shay Mitchell as Emily Fields, as well as the addition of Laura Leighton as Ashley Marin, Alexis Denisof as Byron Montgomery, Bianca Lawson as Maya, as well as Jean Louisa Kelly and Nia Peeples. The Hollywood Reporter also noted that Torrey DeVitto and Sasha Pieterse landed recurring roles in the pilot. The Alloy website later confirmed that Pieterse would be playing Alison DiLaurentis and DeVitto would be Melissa Hastings, also noting Janel Parrish as Mona Vanderwaal and Cody Allen Christian, as Mike Montgomery. In April 2010, Chad Lowe replaced Alexis Denisof as Aria 's father, Byron Montgomery. Also in April, Holly Marie Combs was cast as Ella Montgomery. Ratings Live + SD ratings No. in series No. in season Episode Air date Time slot ( EST ) Rating / Share ( 18 -- 49 ) Viewers ( m ) `` Pilot '' June 8, 2010 ( 2010 - 06 - 08 ) Tuesdays 8 : 00 p.m. 0.9 2.47 `` The Jenna Thing '' June 15, 2010 ( 2010 - 06 - 15 ) 1.0 2.48 `` To Kill a Mocking Girl '' June 22, 2010 ( 2010 - 06 - 22 ) 1.0 2.74 `` Can You Hear Me Now ? '' June 29, 2010 ( 2010 - 06 - 29 ) 0.7 2.08 5 5 `` Reality Bites Me '' July 6, 2010 ( 2010 - 07 - 06 ) 1.0 2.62 6 6 `` There 's No Place Like Homecoming '' July 13, 2010 ( 2010 - 07 - 13 ) 0.9 2.69 7 7 `` The Homecoming Hangover '' July 20, 2010 ( 2010 - 07 - 20 ) 0.9 2.55 8 8 `` Please, Do Talk About Me When I 'm Gone '' July 27, 2010 ( 2010 - 07 - 27 ) 0.9 2.52 9 9 `` The Perfect Storm '' August 3, 2010 ( 2010 - 08 - 03 ) 0.9 2.55 10 10 `` Keep Your Friends Close '' August 10, 2010 ( 2010 - 08 - 10 ) 1.1 3.07 11 11 `` Moments Later '' January 3, 2011 ( 2011 - 01 - 03 ) Mondays 8 : 00 p.m. 1.5 4.20 12 12 `` Salt Meets Wound '' January 10, 2011 ( 2011 - 01 - 10 ) 1.1 3.21 13 13 `` Know Your Frenemies '' January 17, 2011 ( 2011 - 01 - 17 ) 1.2 2.99 14 14 `` Careful What You Wish For '' January 24, 2011 ( 2011 - 01 - 24 ) 1.2 3.17 15 15 `` If at First You Do n't Succeed, Lie, Lie Again '' January 31, 2011 ( 2011 - 01 - 31 ) 1.2 3.19 16 16 `` Je Suis Une Amie '' February 7, 2011 ( 2011 - 02 - 07 ) 1.1 3.14 17 17 `` The New Normal '' February 14, 2011 ( 2011 - 02 - 14 ) 0.9 2.35 18 18 `` The Badass Seed '' February 21, 2011 ( 2011 - 02 - 21 ) 1.0 2.90 19 19 `` A Person of Interest '' February 28, 2011 ( 2011 - 02 - 28 ) 1.0 2.69 20 20 `` Someone to Watch Over Me '' March 7, 2011 ( 2011 - 03 - 07 ) 1.1 2.95 21 21 `` Monsters in the End '' March 14, 2011 ( 2011 - 03 - 14 ) 1.1 2.94 22 22 `` For Whom the Bell Tolls '' March 21, 2011 ( 2011 - 03 - 21 ) 1.3 3.64 DVD release The Complete First Season Set details Special features 22 episodes 963 minutes ( Region 1 ) ; 940 minutes ( Region 2 ) ; 925 minutes ( Region 4 ) 6 - disc set 1.85 : 1 aspect ratio Languages : English ( Dolby Digital 2.0 Surround ) Subtitles : English, and French ( Region 1 ) English, Spanish, Danish, French, Arabic, Dutch, Norwegian, Swedish, English for the Hearing Impaired ( Regions 2 and 4 ) Deleted scenes : Episodes : 2, 3, 5, 8, 12, 13, 14, 16, 19 Pretty Little Liars : Two Truths and a Lie - The girls take turns revealing three things about themselves, not all of the true. It All Started with a Little Lie : Making Pretty Little Liars - The making of Pretty Little Liars Little Secrets from the Set - The cast and crew reveal some juicy behind - the - scenes secrets from the Pretty Little Liars set Release dates United States United Kingdom Australia June 7, 2011 ( 2011 - 06 - 07 ) September 24, 2012 ( 2012 - 09 - 24 ) November 2, 2011 ( 2011 - 11 - 02 ) References ^ Jump up to : Gorman, Bill ( June 9, 2010 ). `` Tuesday Cable : Justified Finale & Law & Order : CI Flat, Plus Deadliest Catch, The Hills, WWE NXT & More ''. TV by the Numbers. Retrieved June 9, 2010. ^ Jump up to : Gorman, Bill ( June 16, 2010 ). `` Pretty Little Liars Bucks the Trend ''. TV by the Numbers. Retrieved June 16, 2010. ^ Jump up to : Gorman, Bill ( June 23, 2010 ). `` Pretty Little Liars Hits Series Highs in Total Viewers ''. TV by the Numbers. Retrieved June 23, 2010. ^ Jump up to : Gorman, Bill ( June 30, 2010 ). `` Tuesday Cable Ratings : Deadliest Catch, Pretty Little Liars, Law & Order : CI, The Hills, Memphis Beat & Lots More ''. TV by the Numbers. Retrieved June 30, 2010. ^ Jump up to : Gorman, Bill ( July 8, 2010 ). `` Tuesday Cable Ratings : Deadliest Catch, Pretty Little Liars, Memphis Beat, Law & Order : CI Finale & More ''. TV by the Numbers. Retrieved July 8, 2010. ^ Jump up to : Gorman, Bill ( July 14, 2010 ). `` Tuesday Cable : Deadliest Catch Soars, Plus White Collar, Covert Affairs, Memphis Beat, The Hills Finale Ratings & More ''. TV by the Numbers. Retrieved July 14, 2010. ^ Jump up to : Seidman, Robert ( July 21, 2010 ). `` Tuesday Cable : Deadliest Catch, Plus White Collar, Pretty Little Liars, Warehouse 13, Teen Mom & More ''. TV by the Numbers. Retrieved July 21, 2010. ^ Jump up to : Seidman, Robert ( July 28, 2010 ). `` Tuesday Cable : Deadliest Catch, Covert Affairs, White Collar, Pretty Little Liars, Teen Mom & More ''. TV by the Numbers. Retrieved July 28, 2010. ^ Jump up to : Seidman, Robert ( August 4, 2010 ). `` Tuesday Cable : Warehouse 13, Pretty Little Liars, Memphis Beat, Teen Mom & More ''. TV by the Numbers. Retrieved August 4, 2010. ^ Jump up to : Seidman, Robert ( August 11, 2010 ). `` Tuesday Cable : ' Pretty Little Liars ' Goes Over 3 Million in Finale + Covert Affairs, Warehouse 13, Teen Mom & More ''. TV by the Numbers. Retrieved August 11, 2010. Jump up ^ Seidman, Robert ( January 11, 2011 ). `` Cable Top 25 : Bowl Games, ' Jersey Shore, ' ' The Closer ' Top Weekly Cable Viewing ''. TV by the Numbers. Retrieved October 15, 2014. ^ Jump up to : Seidman, Robert ( January 11, 2011 ). `` Monday Cable Ratings : Pretty Little Liars, Greek, Hoarders, Men of a Certain Age & More ''. TV by the Numbers. Retrieved January 11, 2011. ^ Jump up to : Gorman, Bill ( January 19, 2011 ). `` Monday Cable Ratings : ' Jersey Shore, ' Special ; Plus ' Skins, ' ' Being Human ' Premieres, ' Pretty Little Liars, ' ' Pawn Stars, ' & More ''. TV by the Numbers. Retrieved January 19, 2011. ^ Jump up to : Seidman, Robert ( January 25, 2011 ). `` Monday Cable Ratings : ' Pretty Little Liars, ' ' Being Human, ' ' Pawn Stars ' Rise ; ' Skins ' Falls & More ''. TV by the Numbers. Retrieved January 25, 2011. ^ Jump up to : Gorman, Bill ( February 1, 2011 ). `` Monday Cable Ratings : ' Pawn Stars ' Up Again ; ' Pretty Little Liars ' Steady ; ' Being Human, ' ' Skins ' Fall & More ''. TV by the Numbers. Retrieved February 1, 2011. ^ Jump up to : Seidman, Robert ( February 8, 2011 ). `` Monday Cable Ratings : ' Pawn Stars ' Leads Again ; ' Pretty Little Liars ' Steady - ish ; ' Skins ' Still Falling & More ''. TV by the Numbers. Retrieved February 8, 2011. ^ Jump up to : Gorman, Bill ( February 15, 2011 ). `` Monday Cable Ratings : ' Pawn Stars ' Leads Again ; ' Pretty Little Liars ' Slips ; ' Skins ' Keeps Falling & More ''. TV by the Numbers. Retrieved February 15, 2011. ^ Jump up to : Seidman, Robert ( February 23, 2011 ). `` Monday Cable Ratings : WWE Raw Leads Night ; ' Pretty Little Liars, ' ' Skins ' Rises + ' Big Time Rush, ' ' Being Human ' & More ''. TV by the Numbers. Retrieved February 23, 2011. ^ Jump up to : Seidman, Robert ( March 1, 2011 ). `` Monday Cable Ratings : ' WWE Raw ' Leads Night ; ' Skins, ' ' Being Human ' Rise + ' Pretty Little Liars, ' ' Cake Boss ' & More ''. TV by the Numbers. Retrieved March 9, 2011. ^ Jump up to : Seidman, Robert ( March 8, 2011 ). `` Monday Cable Ratings : ' WWE Raw ' Leads Night ; ' Skins Drops ; ' Stargate SGU ' Returns + ' Greek ' Finale, ' Pretty Little Liars ' & More ''. TV by the Numbers. Retrieved March 9, 2011. ^ Jump up to : Gorman, Bill ( March 15, 2011 ). `` Monday Cable Ratings : ' WWE Raw ' Leads Night ; ' Skins ; ' Stargate SGU ' + ' Pretty Little Liars ' & More ''. TV by the Numbers. Retrieved March 15, 2011. ^ Jump up to : Seidman, Robert ( March 22, 2011 ). `` Monday Cable Ratings : ' Pawn Stars Tops Night ; Plus ' RAW, ' ' Skins, ' ' Pretty Little Liars ' Rise ; ' Stargate SGU, ' & More ''. TV by the Numbers. Retrieved March 22, 2011. ^ Jump up to : Maughan, Shannon ( June 26, 2008 ). `` Moving On Up : Pretty Little Liars ''. PublishersWeekly.com/Reed Elsevier Inc. Archived from the original on January 28, 2010. Retrieved June 4, 2009. ^ Jump up to : Andreeva, Nellie ( October 19, 2009 ). `` ABC Family nears Little Liars pickup ''. HollywoodReporter.com. Archived from the original on January 28, 2010. Retrieved November 24, 2009. Jump up ^ `` Pretty Little Liars : Reviews and Product Details ''. Amazon.com. Retrieved May 30, 2009. Jump up ^ Andreeva, Nellie ( November 11, 2009 ). `` ABC Family fills comedy, Liars roles ''. HollywoodReporter.com. Archived from the original on January 28, 2010. Retrieved November 24, 2009. Jump up ^ `` ABC Family announces additional casting for its upcoming pilots '' ( Press release ). ABC Family. December 7, 2009. Archived from the original ( PDF ) on January 28, 2010. Retrieved January 28, 2010. ^ Jump up to : Andreeva, Nellie ( December 7, 2009 ). `` Laura Leighton joins Pretty Little Liars ''. HollywoodReporter.com. Archived from the original on January 28, 2010. Retrieved December 7, 2009. Jump up ^ `` The Pretty Little Truth : Pretty Little Liars on TV ! ''. Blogs.alloyentertainment.com ( Official site ). January 28, 2010. Retrieved January 29, 2010. Jump up ^ Andreeva, Nellie ( April 1, 2010 ). `` Chad Lowe joins ABC Family series ''. The Hollywood Reporter. Retrieved April 4, 2010. ^ Jump up to : Gorman, Bill ( January 4, 2011 ). `` Return of 2010 's Breakout Hit Series `` Pretty Little Liars '' Becomes ABC Family 's No. 2 Telecast Ever in Women 18 - 34 / Females 12 - 34 ``. TV by the Numbers. Retrieved January 4, 2011. ^ Jump up to : https://www.amazon.com/Pretty-Little-Liars-Season-1/dp/B003R4ZMJU Jump up ^ Pretty Little Liars - Press Release for ' The Complete 2nd Season ' DVDs of the ABC Family Show - tvshowsondvd.com Jump up ^ `` Pretty Little Liars - Season 1 ( DVD ) ''. Amazon.co.uk. Retrieved February 18, 2014. Jump up ^ `` Pretty Little Liars - The Complete 1st Season ( 5 Disc Set ) ''. ezydvd.com.au. Retrieved February 27, 2012. Sara Shepard 's Pretty Little Liars Pretty Little Liars ( 2006 ) Characters `` A '' Alex Drake Alison DiLaurentis Aria Montgomery Charlotte Drake Emily Fields Hanna Marin Jenna Marshall Mary Drake Melissa Hastings Mona Vanderwaal Red Coat Sara Harvey Spencer Hastings Sydney Driscoll TV series Episodes Season 1 `` Pilot '' `` For Whom the Bell Tolls '' Season 2 `` UnmAsked '' Season 3 `` It Happened ' That Night ' '' Season 4 `` ' A ' Is for A-l-i-v-e '' `` Grave New World '' `` Free Fall '' `` A Is for Answers '' Season 5 `` Miss Me × 100 '' `` How the ' A ' Stole Christmas '' Season 6 `` Game On, Charles '' `` Game Over, Charles '' `` Of Late I Think of Rosewood '' `` Charlotte 's Web '' `` Where Somebody Waits For Me '' `` Hush, Hush, Sweet Liars '' Season 7 `` Tick - Tock, Bitches '' `` Bedlam '' `` The Talented Mr. Rollins '' `` Hit and Run, Run, Run '' `` Along Comes Mary '' `` Wanted : Dead or Alive '' `` Original G'A'ngsters '' `` Exes and OMGs '' `` The Wrath of Kahn '' `` The DArkest Knight '' `` Playtime '' `` These Boots Were Made for Stalking '' `` Hold Your Piece '' `` Power Play '' `` In the Eye Abides the Heart '' `` The Glove That Rocks the Cradle '' `` Driving Miss Crazy '' `` Choose or Lose '' `` Till Death Do Us Part '' Miscellaneous Rosewood, Pennsylvania Ravenswood Pretty Little Liars : The Perfectionists Pretty Dirty Secrets Retrieved from `` https://en.wikipedia.org/w/index.php?title=Pretty_Little_Liars_(season_1)&oldid=808663819 '' Categories : 2010 American television seasons 2011 American television seasons Pretty Little Liars Hidden categories : Infobox television season articles that use the season name parameter Talk Contents About Wikipedia Wikiquote Ελληνικά Español Français Italiano Português Srpskohrvatski / српскохрватски Suomi Edit links This page was last edited on 4 November 2017, at 09 : 39. 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Question: when do you find out who a is season 1
Answer: March 21, 2011