Title: Smallville
Content:  Kristin Kreuk as Lana Lang, the girl next door. Grieving the loss of her parents, she has empathy for everyone and feels connected to Clark. Kreuk was the first to be cast, after Nutter saw an audition tape the actress had sent. Although she left the series after the seventh season, she returned for five episodes in season eight as a special guest star. ; Michael Rosenbaum as Lex Luthor, a billionaire's son sent to Smallville to run the local fertilizer plant. After Clark saves his life, they become fast friends. As the series progresses, Lex's friendship with Clark crumbles until they consider themselves 
Title: Lana Lang (Smallville)
Content:  Lana Lang is a fictional character on the television series Smallville. She has been a series regular since the pilot episode, and has been played continuously by Kristin Kreuk, with two other actresses having portrayed Lana Lang as a child and as an elderly woman. The character of Lana Lang, first created for comic books by Bill Finger and John Sikela in the 1950s as a romantic interest for Superboy, was adapted to television in 2001 by Alfred Gough and Miles Millar. The character has also appeared in various literature based on the Smallville television series, none of which directly continues from or into 
Title: Lana Lang (Smallville)
Content:  for the Marines in the season one finale, a video message breaking up with him. Lana's aunt Nell moves to Metropolis with her fiancé in the season two episode "Ryan", but Lana opts to move in with her friend Chloe Sullivan (Allison Mack) so that she may finish high school in Smallville. By the end of season two, Lana and Clark slowly try and start a romantic relationship, but fear backlash from Chloe because of her personal feelings for Clark. Just as the two give in to their feelings fully, Clark unexpectedly runs away from Smallville in the season two 
Title: List of Smallville characters
Content:  Portrayed by Kristin Kreuk, Lana Lang is one of Clark Kent's friends and on-again-off-again girlfriend. In the first season, Lana and Clark's friendship is just beginning, as she is dating Whitney Fordman during this time. After Whitney leaves for the Marines in the season one finale, Lana and Clark slowly begin to try to start a romantic relationship. In season seven, Lana leaves Smallville, leaving behind a DVD explaining to Clark that, even though she loves him, the only way for him to help the world to the best of his ability would be if she left him and Smallville for good.
Title: Lana Lang (Smallville)
Content:  The Talon, a local coffee shop co-owned by Lana, becomes her new grounding force as Whitney and her aunt have left Smallville. Kreuk thinks that it can be hard to believe that a sixteen-year-old girl could become co-owner of a coffee shop, but she believes that it helps to provide more independence for the character and establish her more within the show. Eventually, in order to really get to know herself, and find her role in life, Lana leaves Smallville for Paris. In season four, Kristin Kreuk felt like Lana is "going a little crazy and is uncertain about her direction, and feels people aren't validating her beliefs".
Title: Lana Lang (Smallville)
Content:  Smallville for good, but vowed to continue to use her powers to preserve life. Initially, Lana is characterized as the intelligent "girl next door". She eventually becomes a tragic figure in Smallville, as the decisions made by Clark and Lex change the character over the course of the show. As Gough explains, by the end of the sixth season, Lana has shown that she can beat Lex at his own game. Over the course of the show, Lana transitions from the girl next door to a more "self-reliant young woman". Kreuk has been nominated for various awards for her portrayal of Lana Lang.
Title: Lana Lang (Smallville)
Content:  ploy so that Adam could investigate Clark. Season three's "Forsaken" reveals that Lana, in order to move on with her life, applies and is admitted into a program to study in Paris, France. Season four shows that Lana, while in Paris, began a romantic relationship with Jason Teague (Jensen Ackles). At the beginning of season four, Lana returns to Smallville after receiving a mysterious tattoo on her lower back, which resembles a symbol on the local Kawatche cave walls, when she touched the tomb of Countess Margaret Isobel Theroux. In season four's "Spell" and "Sacred", the tattoo acts as 
Title: Lana Lang (Smallville)
Content:  Lana makes her first literary appearance in Smallville: Strange Visitors, published by Aspect. In Strange Visitors, Lana attempts to organize a fund raiser for the family of a school mate, Stewart, who was diagnosed with terminal cancer. Her effort is rendered moot when Lex Luthor and Dr. Donald Jacobi, a con artist that comes to Smallville, pick up Stewart's medical bills after a meteor rock removes all of the malignant cancer cells in his brain. In Smallville: Dragon, Lana visits an antiques dealer, Mrs. Mayfern, looking for a gift for her boyfriend, Whitney. When she leaves she breaks up with Whitney and starts dating Clark. It is eventually discovered that she was hypnotized by Mrs. Mayfern, whose homegrown herbal tea is fertilized by meteor rocks.
Title: Lana Lang (Smallville)
Content:  television episodes. In Smallville, Lana is the first main love interest for Clark Kent, though, in the first season she is dating Whitney Fordman. By season two, with Whitney's departure, Lana and Clark begin to grow closer. Clark's dishonesty over the secrets he is hiding causes their relationship to end. Lana then grows closer to Lex Luthor, whom she marries and divorces in the sixth season. Eventually Lana learns the truth about Clark and they get back together. After stealing a kryptonite-powered suit from Lex, Lana absorbs an enormous amount of kryptonite radiation, which prohibits her from getting too close to Clark, and she 
Title: Lana Lang
Content:  Lang. Lana now lives in Metropolis with Supergirl, and is working as the editor of the Business section of the Daily Planet. She briefly returns to Smallville to attend Jonathan Kent's funeral. However, unable to muster enough resolve to patch up things with Clark, Lana leaves before giving him her condolences. While attending a student journalism award ceremony with Jimmy Olsen and Cat Grant, Lana suddenly collapses, with blood pouring out her nose.; She receives a call from her doctor telling her that he has "bad news" for her. After Lana has another collapse, she is taken to the 

Question: what season did lana lang leave smallville?
Answer: Smallville - Season 8.