The Big Bang Theory ( season 11 ) - wikipedia The Big Bang Theory ( season 11 ) The Big Bang Theory ( season 11 ) iTunes digital art Starring Johnny Galecki Jim Parsons Kaley Cuoco Simon Helberg Kunal Nayyar Mayim Bialik Melissa Rauch Kevin Sussman Country of origin United States No. of episodes 20 Release Original network CBS Original release September 25, 2017 ( 2017 - 09 - 25 ) -- present ( present ) Season chronology ← Previous Season 10 List of The Big Bang Theory episodes The eleventh season of the American television sitcom The Big Bang Theory premiered on CBS on Monday, September 25, 2017. It returned to its regular Thursday time slot on November 2, 2017, after Thursday Night Football on CBS ended. In March 2017, CBS renewed the series for two additional seasons, bringing its total to twelve, and running through the 2018 -- 19 television season. Contents 1 Production 2 Cast 2.1 Main cast 2.2 Recurring cast 2.3 Guest cast 3 Episodes 4 Ratings 5 References 6 External links Production Just like the previous three seasons, the first five episodes aired on Mondays due to CBS ' contractual rights to air the Thursday Night Football games. After Thursday Night Football ended, the series returned to its regular Thursday schedule starting on November 2, 2017. Filming for the eleventh season began on August 15, 2017 ; it was also announced with the taping report that the premiere for the eleventh season would be titled `` The Proposal Proposal ''. Before the season premiered, five episodes were filmed from August 15 to September 19, 2017. According to TV Guide, Steve Holland announced on September 22, 2017 that both Bob Newhart and Wil Wheaton would return this season after their absences during Season 10. Cast Main article : List of The Big Bang Theory characters Main cast Johnny Galecki as Dr. Leonard Hofstadter Jim Parsons as Dr. Sheldon Cooper Kaley Cuoco as Penny Simon Helberg as Howard Wolowitz Kunal Nayyar as Dr. Rajesh `` Raj '' Koothrappali Mayim Bialik as Dr. Amy Farrah Fowler Melissa Rauch as Dr. Bernadette Rostenkowski - Wolowitz Kevin Sussman as Stuart Bloom Recurring cast Laurie Metcalf as Mary Cooper Christine Baranski as Dr. Beverly Hofstadter Stephen Hawking as himself Regina King as Janine Davis Brian Posehn as Dr. `` Bert '' Bertram Kibbler Wil Wheaton as himself Bob Newhart as Dr. Arthur Jeffries / Professor Proton John Ross Bowie as Dr. Barry Kripke Dean Norris as Colonel Richard Williams Brian Thomas Smith as Zack Johnson Brian George as Dr. V.M. Koothrappali Pamela Adlon as Halley Wolowitz ( voice only ) Guest cast Riki Lindhome as Ramona Nowitzki Ira Flatow as himself Swati Kapila as Ruchi Beth Behrs as Nell Walton Goggins as Oliver Bill Gates as himself Peter MacNicol as Dr. Robert Wolcott Neil Gaiman as himself Jerry O'Connell as George Cooper Jr. Courtney Henggeler as Missy Cooper Lauren Lapkus as Denise Teller Kathy Bates Mark Hamill Episodes See also : List of The Big Bang Theory episodes No. overall No. in season Title Directed by Written by Original air date Prod. code U.S. viewers ( millions ) 232 `` The Proposal Proposal '' Mark Cendrowski Story by : Chuck Lorre & Eric Kaplan & Jeremy Howe Teleplay by : Steve Holland & Maria Ferrari & Tara Hernandez September 25, 2017 ( 2017 - 09 - 25 ) T12. 15601 17.65 Amy enthusiastically accepts Sheldon 's marriage proposal. However, when dining with Amy 's colleagues later that night, Sheldon is offended that they are more impressed with Amy 's work than his own. With help from Stephen Hawking, Sheldon later comes to grips with the fact that he will not always be the center of attention in the marriage. Bernadette is shocked to realize that she is pregnant again. She and Howard are not thrilled at the idea of having another baby so soon after their first. They attempt to convince Leonard and Penny to have a child as well, but are rebuffed. Title reference : Sheldon 's proposal of marriage 233 `` The Retraction Reaction '' Mark Cendrowski Story by : Steven Molaro & Steve Holland & Maria Ferrari Teleplay by : Dave Goetsch & Eric Kaplan & Anthony Del Broccolo October 2, 2017 ( 2017 - 10 - 02 ) T12. 15602 14.06 Leonard gives an interview on public radio where he admits physics research might be at a dead end. The university is furious and, while trying to think of reasons to put in a retraction, he depresses Sheldon into thinking he might be right. Howard and Raj come over and end up just as depressed. Getting drunk with Penny, the men go to the grave of Richard Feynman and realize there is hope for physics as long as they believe in it. Leonard accidentally sends a drunken email to Human Resources. Meanwhile, Amy and Bernadette agree with each other to keep quiet about the success in their careers so as not to upset Sheldon and Howard. While bragging to each other, they end up arguing which of their fields is better. Title reference : Leonard 's depression while writing a retraction of his statements on the radio. 234 `` The Relaxation Integration '' Mark Cendrowski Story by : Chuck Lorre & Steve Holland & Adam Faberman Teleplay by : Maria Ferrari & Andy Gordon & Tara Hernandez October 9, 2017 ( 2017 - 10 - 09 ) T12. 15603 13.13 Sheldon can not find the perfect wedding date and begins talking in his sleep, adopting the persona of a laid - back person who goes with the flow. Amy and Penny believe that his subconscious mind is trying to tell him to be more relaxed ; his attempt to be so while wearing flip - flops ends in disaster. He decides to leave all the wedding planning to Amy while he wears a Star Trek uniform underneath his tuxedo. Meanwhile, Raj and Stuart both become interested in Bernadette 's new coworker Ruchi. While she likes them both as friends, she does not want a relationship with anyone. Title reference : Sheldon trying to embrace the relaxed side of his personality. 235 `` The Explosion Implosion '' Mark Cendrowski Story by : Bill Prady & Maria Ferrari & Tara Hernandez Teleplay by : Steve Holland & Eric Kaplan & Jeremy Howe October 16, 2017 ( 2017 - 10 - 16 ) T12. 15604 13.07 Howard and Bernadette learn their second child will be a boy, leading Howard to doubt whether he can be a good father to a son. He and Sheldon go out in the desert to test launch a model rocket, but it explodes, causing him further doubt. On the way home, Howard does a good job coaching Sheldon to drive them home, for which Sheldon tells him he will be a good teacher to his son. Leonard 's mother Beverly begins talking to Penny as a friend and confidant, troubling Leonard, especially when he learns that Beverly told Penny that she was proud of her, a level of praise she never bestowed upon Leonard himself. When Leonard confronts Beverly, he is touched when she says that of all of her children 's spouses, Penny is the one by whom she is most impressed and that, for this, she is indeed proud of him. Meanwhile, Raj helps Bernadette turn baby girl clothes into boy ones. Title reference : The fate of Sheldon and Howard 's model rocket. 236 5 `` The Collaboration Contamination '' Nikki Lorre Story by : Steven Molaro & Steve Holland & Eric Kaplan Teleplay by : Dave Goetsch & Maria Ferrari & Jeremy Howe October 23, 2017 ( 2017 - 10 - 23 ) T12. 15605 13.20 Amy and Howard begin collaborating on a neuroprosthetics project, upsetting Sheldon and Raj, who feel they are not spending as much time with them. When they seek solace with an annoyed Bernadette, she exploits the situation to trick Sheldon into doing Howard 's chores. Penny successfully employs the approaches recommended in one of Bernadette 's parenting books to deal with Sheldon, but Leonard believes she is coddling Sheldon too much. Sheldon and Raj resolve the issue of missing their significant others by spending time together. Title reference : Amy and Howard 's collaboration contaminating Sheldon and Raj 's moods. 237 6 `` The Proton Regeneration '' Mark Cendrowski Story by : Steven Molaro, Dave Goetsch, Alex Yonks Teleplay by : Dave Steve Holland, Andy Gordon, Jeremy Howe November 2, 2017 ( 2017 - 11 - 02 ) T12. 15606 14.14 Sheldon 's childhood science show with Professor Proton is being rebooted. After unsuccessfully auditioning for the part, he goes to Wil Wheaton for acting tips for his second audition. However, Sheldon is later dismayed when Wil has somehow taken the role instead. Talking it over with Arthur in his dreams he is still upset his idol is replaced and considers Wil an enemy again. Meanwhile, Howard gets a vasectomy while Bernadette is on bed rest. Penny offers to take care of Halley for them but they insult her by saying Penny is irresponsible. Halley ends up saying her first word by calling Penny `` Mama. '' Title reference : The announced reboot of the Professor Proton series. 238 7 `` The Geology Methodology '' Mark Cendrowski Story by : Steven Holland & Anthony Del Broccolo & Adam Faberman Teleplay by : Eric Kaplan & Maria Ferrari & Tara Hernandez November 9, 2017 ( 2017 - 11 - 09 ) T12. 15607 13.80 Bert asks for Sheldon 's help in a geology research project relating to dark matter. Sheldon secretly agrees, but is too embarrassed to admit he is working with rocks. Bert finds out about this and ends their partnership. After talking with Amy, Sheldon goes to apologize, only to find Leonard has taken his place. Meanwhile, Raj runs into Ruchi again and goes out with her, but she does not believe in romantic love. After Howard and Bernadette tell Raj that he can just have sex with Ruchi, he agrees to keep it casual. Title reference : Sheldon working in geology with Bert. 239 8 `` The Tesla Recoil '' Anthony Rich Story by : Chuck Lorre & Eric Kaplan & Tara Hernandez Teleplay by : Steve Holland & Maria Ferrari & Jeremy Howe November 16, 2017 ( 2017 - 11 - 16 ) T12. 15608 13.44 After learning Sheldon went behind their backs to work with the military again, Leonard and Howard say Sheldon is like Thomas Edison, taking credit for other 's ideas, while they are more like Nikola Tesla. Leonard and Howard bring in Barry Kripke to help create a better idea than Sheldon 's, but Kripke goes to the military himself cutting all three of them out. Meanwhile, Bernadette fears Ruchi is trying to steal her projects at work while she is on maternity leave, and hires Raj to spy on her. Though he finds proof that Ruchi may be stealing from Bernadette, Raj tries to defend Ruchi like a boyfriend would, pointing out Bernadette 's hypocrisy as she would 've most likely stolen from other people 's projects as well. Ruchi is not happy about this and promptly dumps Raj. Title reference : The mens ' discussion of Tesla and Edison. 240 9 `` The Bitcoin Entanglement '' Mark Cendrowski Story by : Steve Holland & Andy Gordon & Jeremy Howe Teleplay by : Dave Goetsch & Maria Ferrari & Anthony Del Broccolo November 30, 2017 ( 2017 - 11 - 30 ) T12. 15609 13.84 In 2010, Leonard, Howard and Raj mined a lot of Bitcoin, worth thousands of dollars seven years later, but leave Sheldon out due to his fear of tax implications. Flashbacks are shown of how the Bitcoin ended up on an old laptop of Leonard 's, which Penny gave to her old boyfriend Zack after she and Leonard broke up. In 2017, Leonard and Penny retrieve the computer from Zack, who first shows them a video of a drunken Penny apologizing for breaking up with Leonard. The Bitcoin is not found on the laptop. Sheldon had moved it to a flash drive on Leonard 's keychain to teach them a lesson, but Leonard lost the keychain years ago. A final flashback to 2013 shows Stuart discovering the flash drive, which he decides to erase and sell for $10. Title reference : The men trying to find their old Bitcoin investment. 241 10 `` The Confidence Erosion '' Mark Cendrowski Story by : Bill Prady & Maria Ferrari & Adam Faberman Teleplay by : Steve Holland & Eric Kaplan & Tara Hernandez December 7, 2017 ( 2017 - 12 - 07 ) T12. 15610 14.41 When Raj loses a job interview at a planetarium, his father says he has no confidence because Howard always makes fun of him. Raj distances himself from Howard and later gets the job. Howard is hurt by this ( even after apologizing to him ) and tries to make amends with Raj after his first talk at the planetarium, but when he sees him get a date, he leaves without speaking to him, thinking that the latter 's life is better without him. Meanwhile, Sheldon and Amy try randomly dividing up wedding tasks, but they keep arguing. The only thing they can agree on is to get married so they decide to just get married at City Hall. However, Sheldon decides that he wants a first dance with his new wife, and they go home to plan their wedding. Title reference : Howard eroding Raj 's confidence. 242 11 `` The Celebration Reverberation '' Mark Cendrowski Story by : Steve Holland & Eric Kaplan & Alex Ayers Teleplay by : Dave Goetsch & Maria Ferrari & Jeremy Howe December 14, 2017 ( 2017 - 12 - 14 ) T12. 15611 13.74 Howard and Raj are still fighting so Howard dis - invites Raj to Halley 's birthday party. However, when Howard 's designated party planner Stuart pulls out at the last minute, Raj agrees to plan the party, which does n't turn out too well due to Halley being asleep, Bernadette on bed rest and no people turning up. When Howard and Raj get into a shoving match in the party 's bounce house, they end up letting out their frustrations with each other, but also having fun and reconciling. Leonard is depressed upon receiving his successful brother 's Christmas card and attempts to make a list of what he and Penny accomplished this year, but does n't come up with much. This prompts them to think about their plans for the future, so they decide to go on trips and achieve more out of life together before starting a family. Sheldon cooks Amy a Little House on the Prairie - themed birthday dinner, which gives them both food poisoning. They eventually recover enough to attend Halley 's birthday party with the others, where they decide to have fun in the bouncy castle and then have sex in Howard and Bernadette 's house. Title reference : Amy and Halley 's birthday celebrations. 243 12 `` The Matrimonial Metric '' Mark Cendrowski Story by : Maria Ferrari & Tara Hernandez & Jeremy Howe Teleplay by : Steve Holland & Eric Kaplan & Andy Gordon January 4, 2018 ( 2018 - 01 - 04 ) T12. 15612 16.16 Sheldon and Amy struggle to choose a best man and maid of honor from their friends. They secretly decide to test and score them, allowing everyone to have an equal shot at either role. Once the gang finds out, none of them apart from Bernadette and Stuart want to be in the wedding. Sheldon settles for Stuart as best man, but once Leonard tells Sheldon that as the groom, the decision is his alone, he picks Leonard. Amy is set to call Bernadette but once Penny realizes Amy is her best friend, she immediately pitches herself for the position and Amy enthusiastically chooses her. Amy later makes Penny tell Bernadette the bad news. Title reference : Sheldon and Amy scoring their friends for roles in the wedding. 244 13 `` The Solo Oscillation '' Mark Cendrowski Story by : Chuck Lorre & Steve Holland & Anthony Del Broccolo Teleplay by : Eric Kaplan & Maria Ferrari & Jeremy Howe January 11, 2018 ( 2018 - 01 - 11 ) T12. 15613 15.93 With Leonard, Howard, Raj and Amy accomplishing so much on their respective projects, Sheldon is forced to admit he has nothing important to work on. He makes Amy leave the apartment for a few days so he can focus, but can not come up with any ideas and calls his mother as a distraction. Leonard and Amy have fun recreating experiments from when they were growing up, boring Penny, so she eats with Sheldon as he mulls over his scientific studies. Penny helps him realize that his study of dark matter is his rebound science from string theory, which Sheldon admits he never forgot about, but explaining string theory to her inspires Sheldon, helping him discover a potential breakthrough in the field. Meanwhile Howard is too busy with his family to be in the band with Raj, so Raj brings in Bert. But when Howard annoys Bernadette by writing an astronaut - themed musical while she is on bed - rest, she makes him rejoin the band. The three are poorly received, after singing Bert 's original song about the boulder from Indiana Jones at a Bar mitsvah. Title reference : A triple entendre to represent Sheldon going into isolation to figure out his future research field only to go back to studying string theory, the vibration of the strings in string theory, and Howard 's oscillation between being in a band with Raj and being solo. 245 14 `` The Separation Triangulation '' Mark Cendrowski Story by : Chuck Lorre & Eric Kaplan & Maria Ferrari Teleplay by : Steven Molaro & Steve Holland & Tara Hernandez January 18, 2018 ( 2018 - 01 - 18 ) T12. 15614 14.92 Raj hooks up with a recently separated woman, Nell, after one of his lectures at the planetarium. Her husband Oliver confronts Raj at the planetarium and then breaks down over the end of his marriage. After comforting Oliver, Raj talks to Nell and convinces her to give her husband another chance. Meanwhile, after diving once again into string theory and sprawling his work across his and Amy 's apartment, Sheldon approaches a reluctant Leonard and Penny and convinces them to let him use his old room to study for a three - day trial period with an agreement to be quiet and stay out of their way. Sheldon surprisingly sticks to this agreement, being a reasonably good guest, which shockingly frustrates Leonard to no end. After Leonard lets out his frustrations, Sheldon then renegotiates the guest tenancy agreement for an extra few days and resumes being his normal demanding self, much to Leonard 's relief. Title reference : A double entendre that refers to both the love triangle between Raj, Nell, and Oliver, who is upset at his separation from Nell and the roommate triangle that has reformed between Sheldon, Leonard, and Penny, a distinct callback to the show 's initial seasons. 246 15 `` The Novelization Correlation '' Mark Cendrowski Story by : Steve Holland & Andy Gordon & Adam Faberman Teleplay by : Eric Kaplan & Maria Ferrari & Jeremy Howe February 1, 2018 ( 2018 - 02 - 01 ) T12. 15615 14.69 Sheldon and Amy are surprised to find that Wil Wheaton 's new Professor Proton show is actually very entertaining and that Wil had Howard on as a guest. On Howard 's suggestion, Sheldon apologizes to Wil, mending their friendship, and tells him he wants to be on the show ; but Wil asks for Amy. Sheldon tells her to do it, but she says she often does n't do things to avoid upsetting him. Sheldon is horrified when he realises how selfish he has been, especially when he finds out that the men do the same for him. Sheldon encourages Amy to go on the show to inspire girls to pursue science while trying to control his obvious jealousy for her. Meanwhile, Leonard writes a book about a physicist that solves a murder, the protagonist Logan Dean is based on himself. Bernadette points out Logan 's mean boss Illsa is similar to Penny, who thinks it is based on Bernadette, though Leonard does not correct her. However, Bernadette tells Penny the truth, upsetting her and making her mad at Leonard. After calling his mother for advice, Leonard learns that Illsa is actually like her ; but abandons the book when he realizes he wrote romantic tension into the relationship between the characters. Title reference : The uncertainty of which woman in Leonard 's life he subconsciously based the mean boss character in his novel on. 247 16 `` The Neonatal Nomenclature '' Gay Linvill Story by : Eric Kaplan & Maria Ferrari & Anthony Del Broccolo Teleplay by : Steve Holland & Tara Hernandez & Adam Faberman March 1, 2018 ( 2018 - 03 - 01 ) T12. 15616 13.75 Bernadette 's due date arrives but she still has n't given birth. As Amy and Howard work together at the college, the rest of the friends try various ways to initiate her labor, though Sheldon wants to play a complicated board game instead. Amy shocks Howard by saying Bernadette has already decided to name the baby after her father, Michael. He does n't agree and everyone makes suggestions as to what to name the baby. Bernadette goes into labor and gives birth to a son named Neil, after Neil Armstrong, Neil Gaiman, and Neil Diamond, with Michael as the middle name. Title reference : The naming of the Wolowitz son before he is born. 248 17 `` The Athenaeum Allocation '' Mark Cendrowski Story by : Steve Holland & Steven Molaro & Tara Hernandez Teleplay by : Dave Goetsch & Eric Kaplan & Maria Ferrari March 8, 2018 ( 2018 - 03 - 08 ) T12. 15617 13.88 Sheldon and Amy decide on a wedding date of May 12th. They want to have their reception at the Athenaeum at Caltech. While scouting the location, they are shocked to see Leonard and Penny eating there, as Leonard had told Sheldon their application had been denied. In reality, Leonard just wanted a place to avoid Sheldon. Kripke has booked the venue for his birthday party on the same day as the wedding. Leonard cleans radioactive sludge for Kripke to get the date for Sheldon as an apology for lying. Kripke eventually agrees to change the day but when Amy hears he wants to sing at the wedding, she suggests they get married at the Griffith Observatory instead. Meanwhile, Bernadette and Howard are unsure if one of them should quit their job to stay home with the children. Howard volunteers, but when left alone with the children he passes out exhausted, leaving Raj in charge. When Bernadette meets Penny for lunch, she realizes that she loves being at the office again, but does n't want to leave the children. She and Howard promise to figure it out later after they take a nap. Title reference : The Athenaeum date being allocated for Kripke 's birthday instead of the wedding. 249 18 `` The Gates Excitation '' Mark Cendrowski Story by : Eric Kaplan & Maria Ferrari & Andy Gordon Teleplay by : Steve Holland & Tara Hernadnez & Jeremy Howe March 29, 2018 ( 2018 - 03 - 29 ) T12. 15618 13.26 The men are excited that Bill Gates is visiting Penny 's pharmaceutical company, although she says that she can not bring them along. Sheldon believes that it 's an April Fools ' Day prank. Leonard sees what hotel Gates is staying at on Penny 's schedule, so he, Raj and Howard meet him in the lobby the day before. Once Sheldon sees proof, the men twice send him to the wrong hotel as real pranks. Penny says Leonard can meet Gates for real, so he fakes being sick to avoid him. When Penny puts Gates on a video call, he recognizes Leonard from the previous night. Meanwhile, Amy is tired of Bernadette only talking about her children, so Bernadette uses her expanded parental brain to learn random science facts. Title reference : The men being excited to meet Bill Gates. 250 19 `` The Tenant Disassociation '' Mark Cendrowski Story by : Steve Holland & Jeremy Howe & Trevor Alper Teleplay by : Dave Goetsch & Eric Kaplan & Maria Ferrari April 5, 2018 ( 2018 - 04 - 05 ) T12. 15619 13.00 After Sheldon has a food truck moved away from the building, Leonard and Penny are shocked to find he is the leader and sole member of the Tenants Association for the building. Amy does n't want to be in the middle but secretly suggests they rally support from the other tenants to vote Sheldon out. Nobody else supports Leonard so Amy tells them Sheldon was never added to the lease when he moved across the hall with her. Sheldon fires back with his own legal technicality so Amy is forced to support Leonard. She makes Sheldon happy by saying he can be Leonard 's official opposition, making Leonard believe he made a mistake. Meanwhile, Howard and Raj find a drone. Raj returns it to the cute owner Cynthia and gets her number. Unfortunately, Cynthia watches footage of Raj on the drone and is immediately turned off. Title reference : Sheldon leaving the Tenants Association. 251 20 `` The Reclusive Potential '' Mark Cendrowski Story by : Maria Ferrari & Anthony Del Broccolo & Tara Hernandez Teleplay by : Steve Holland & Eric Kaplan & Adam Faberman April 12, 2018 ( 2018 - 04 - 12 ) T12. 15620 12.77 Sheldon has been writing to the reclusive scientist Dr. Wolcott who invites Sheldon to visit him in his completely isolated mountain cabin. The women quickly ask Leonard, Raj and Howard to tag along with him, making this his bachelor party, despite Sheldon 's assertions that it should n't be called such. Wolcott has a brilliant mind but his behavior is very strange to the guys. He tells Sheldon he cut off all contact with others to focus on science. Though Sheldon enjoys the science, he decides that he does n't want to live like Wolcott because of his friends and Amy. The guys leave to avoid Wolcott, whose theories about time make him doubt whether the guys were ever there. Meanwhile, Penny and Bernadette throw Amy a quilting bee for her bachelorette party, which she quickly finds boring. When Amy tells them she wants a night full of bad decisions as she earlier implied, they go to a bar where Amy drinks a few shots and passes out in twelve minutes. When she wakes up back at the apartment hungover and disappointed, the women lie and reassure her she had a wild time, involving her drunkenly riverdancing. Title reference : Sheldon considering the scientific potential in living as a recluse. 252 21 `` The Comet Polarization '' Mark Cendrowski Story by : Steve Holland & Bill Prady & Eric Kaplan Teleplay by : Maria Ferrari & Andy Gordon & Tara Hernandez April 19, 2018 ( 2018 - 04 - 19 ) T12. 15621 TBD 253 22 `` The Monetary Insufficiency '' Nikki Lorre Story by : Dave Goetsch & Maria Ferrari & Tara Hernandez Teleplay by : Steve Holland & Eric Kaplan & Jeremy Howe April 26, 2018 ( 2018 - 04 - 26 ) T12. 15622 TBD Ratings No. Title Air date Rating / share ( 18 -- 49 ) Viewers ( millions ) DVR ( 18 -- 49 ) DVR viewers ( millions ) Total ( 18 -- 49 ) Total viewers ( millions ) `` The Proposal Proposal '' September 25, 2017 4.1 / 16 17.65 1.7 5.42 5.8 23.08 `` The Retraction Reaction '' October 2, 2017 3.2 / 12 14.06 1.8 5.14 5.0 19.20 `` The Relaxation Integration '' October 9, 2017 2.9 / 11 13.13 1.6 4.77 4.5 17.90 `` The Explosion Implosion '' October 16, 2017 2.8 / 11 13.07 1.6 4.64 4.4 17.71 5 `` The Collaboration Contamination '' October 23, 2017 2.8 / 10 13.20 1.6 4.76 4.4 17.96 6 `` The Proton Regeneration '' November 2, 2017 2.7 / 11 14.14 1.8 5.14 4.5 19.28 7 `` The Geology Methodology '' November 9, 2017 2.8 / 11 13.80 1.6 4.76 4.4 18.56 8 `` The Tesla Recoil '' November 16, 2017 2.6 / 11 13.44 1.7 4.84 4.3 18.28 9 `` The Bitcoin Entanglement '' November 30, 2017 2.5 / 10 13.84 1.7 4.70 4.2 18.54 10 `` The Confidence Erosion '' December 7, 2017 2.8 / 10 14.41 1.7 4.95 4.5 19.36 11 `` The Celebration Reverberation '' December 14, 2017 2.6 / 11 13.74 TBD TBD TBD TBD 12 `` The Matrimonial Metric '' January 4, 2018 3.1 / 12 16.16 1.4 3.74 4.5 19.90 13 `` The Solo Oscillation '' January 11, 2018 3.1 / 12 15.93 1.8 5.18 4.9 21.11 14 `` The Separation Triangulation '' January 18, 2018 2.9 / 12 14.92 1.6 4.65 4.5 19.58 15 `` The Novelization Correlation '' February 1, 2018 2.9 / 12 14.69 1.7 4.88 4.6 19.58 16 `` The Neonatal Nomenclature '' March 1, 2018 2.5 / 11 13.75 1.6 4.83 4.1 18.58 17 `` The Athenaeum Allocation '' March 8, 2018 2.6 / 11 13.88 1.7 4.62 4.3 18.50 18 `` The Gates Excitation '' March 29, 2018 2.5 / 11 13.26 1.7 4.90 4.2 18.17 19 `` The Tenant Disassociation '' April 5, 2018 2.4 / 11 13.00 1.6 4.67 4.0 17.67 20 `` The Reclusive Potential '' April 12, 2018 2.4 / 11 12.77 TBD TBD TBD TBD References Jump up ^ `` CBS Announces New 2017 -- 2018 Fall Schedule ''. The Futon Critic. May 17, 2017. Retrieved May 30, 2017. Jump up ^ `` CBS Announces Fall 2017 - 2018 Primetime Premiere Dates ''. The Futon Critic. Retrieved September 27, 2017. Jump up ^ Goldberg, Lesley ( March 20, 2017 ). `` ' Big Bang Theory ' Officially Renewed for Two Seasons as Mayim Bialik, Melissa Rauch Await Deals ''. The Hollywood Reporter. Retrieved March 20, 2017. Jump up ^ `` Taping Report Thread ''. The Big Bang Theory Forums. Retrieved September 28, 2017. Jump up ^ `` The Big Bang Theory 's New Boss on Young Sheldon Crossovers and Season 11 ''. TVGuide.com. September 22, 2017. Retrieved September 28, 2017. Jump up ^ http://thefutoncritic.com/listings/20180405cbs09 Jump up ^ Schwartz, Ryan ( March 22, 2018 ). `` Big Bang Theory Finale : Jerry O'Connell Cast as Sheldon 's Brother Georgie ''. TVLine. Retrieved March 22, 2018. ^ Jump up to : `` Big Bang Theory Finale : Sheldon and Amy 's Wedding Guest List Revealed ( and It Includes Luke Skywalker ! ) ''. TVline.com. April 16, 2018. Retrieved April 16, 2018. ^ Jump up to : Porter, Rick ( September 26, 2017 ). `` ' Big Bang ' and ' Young Sheldon ' adjust up, ' Good Doctor, ' ' DWTS, ' ' The Brave, ' ' Me, Myself & I ' down : Monday final ratings ''. TV by the Numbers. Retrieved September 26, 2017. ^ Jump up to : Porter, Rick ( October 3, 2017 ). `` ' Big Bang Theory, ' ' Voice ' adjust up ; ' Good Doctor, ' ' DWTS, ' ' Kevin Can Wait, ' ' The Brave ' & ' Scorpion ' down : Monday final ratings ''. TV by the Numbers. Retrieved October 3, 2017. ^ Jump up to : Porter, Rick ( October 10, 2017 ). `` ' Big Bang Theory ' and ' Good Doctor ' adjust up, other CBS shows and ' The Brave ' down : Monday final ratings ''. TV by the Numbers. Retrieved October 10, 2017. ^ Jump up to : Porter, Rick ( October 17, 2017 ). `` ' Big Bang, ' ' Voice, ' ' Lucifer, ' ' Me, Myself & I ' adjust up, ABC and ' 9JKL ' down : Monday final ratings ''. TV by the Numbers. Retrieved October 17, 2017. ^ Jump up to : Porter, Rick ( October 24, 2017 ). `` ' The Good Doctor ' adjusts down, ' Big Bang Theory ' and ' Voice ' adjust up : Monday final ratings ''. TV by the Numbers. Retrieved October 24, 2017. ^ Jump up to : Porter, Rick ( November 3, 2017 ). `` ' Will & Grace ' adjusts up, ' Sheldon ' and other CBS shows adjust down : Thursday final ratings ''. TV by the Numbers. Retrieved November 3, 2017. ^ Jump up to : Porter, Rick ( November 10, 2017 ). `` ' Big Bang Theory ' and ' Thursday Night Football ' adjust up : Thursday final ratings ''. TV by the Numbers. Retrieved November 10, 2017. ^ Jump up to : Porter, Rick ( November 17, 2017 ). `` ' Supernatural ' and NFL adjust up, ' Young Sheldon ' adjusts down : Thursday final ratings ''. TV by the Numbers. Retrieved November 17, 2017. ^ Jump up to : Porter, Rick ( December 4, 2017 ). `` ' Supernatural, ' ' Big Bang Theory ' and NFL adjust up : Thursday final ratings ''. TV by the Numbers. Retrieved December 4, 2017. ^ Jump up to : Porter, Rick ( December 8, 2017 ). `` ' Supernatural ' and NFL adjust up : Thursday final ratings ''. TV by the Numbers. Retrieved December 8, 2017. ^ Jump up to : Porter, Rick ( December 15, 2017 ). `` ' Thursday Night Football ' adjusts up, still at season low : Thursday final ratings ''. TV by the Numbers. Retrieved December 19, 2017. ^ Jump up to : Porter, Rick ( January 8, 2018 ). `` ' The Four, ' ' Will & Grace, ' everything else unchanged : Thursday final ratings ''. TV by the Numbers. Retrieved January 8, 2018. ^ Jump up to : Porter, Rick ( January 12, 2018 ). `` ' Big Bang Theory, ' ' Young Sheldon ' and ' The Four ' adjust up : Thursday final ratings ''. TV by the Numbers. Retrieved January 12, 2018. ^ Jump up to : Porter, Rick ( January 22, 2018 ). `` ' Grey 's Anatomy ' adjusts up, ' The Four, ' ' Scandal ' and ' Great News ' down : Thursday final ratings ''. TV by the Numbers. Retrieved January 22, 2018. ^ Jump up to : Porter, Rick ( February 2, 2018 ). `` ' Big Bang Theory, ' ' The Four ' adjust up, ' Mom ' and ' AP Bio ' adjust down : Thursday final ratings ''. TV by the Numbers. Retrieved February 2, 2018. ^ Jump up to : Porter, Rick ( March 2, 2018 ). `` ' Superstore, ' ' SWAT, ' ' Scandal ' and ' AP Bio ' adjust down : Thursday final ratings ''. TV by the Numbers. Retrieved March 2, 2018. ^ Jump up to : Porter, Rick ( March 9, 2018 ). `` ' Young Sheldon, ' ' SWAT, ' all NBC shows adjust down : Thursday final ratings ''. TV by the Numbers. Retrieved March 9, 2018. ^ Jump up to : Porter, Rick ( March 30, 2018 ). `` ' Big Bang Theory, ' ' Grey 's Anatomy ' and ' Chicago Fire ' adjust up, ' SWAT ' adjusts down : Thursday final ratings ''. TV by the Numbers. Retrieved March 30, 2018. ^ Jump up to : Porter, Rick ( April 6, 2018 ). `` ' Big Bang Theory, ' ' Grey 's Anatomy ' adjust up, ' Mom, ' ' Supernatural, ' ' Arrow ' down : Thursday final ratings ''. TV by the Numbers. Retrieved April 6, 2018. ^ Jump up to : Porter, Rick ( April 13, 2018 ). `` ' Big Bang Theory, ' ' Grey 's Anatomy ' and ' Superstore ' adjust up : Thursday final ratings ''. TV by the Numbers. Retrieved April 13, 2018. Jump up ^ `` ( # T12. 15621 ) `` The Comet Polarization '' ``. The Futon Critic. Retrieved April 7, 2018. Jump up ^ `` ( # T12. 15622 ) `` The Monetary Insufficiency '' ``. The Futon Critic. Retrieved April 7, 2018. Jump up ^ Porter, Rick ( October 13, 2017 ). `` ' This Is Us ' and ' The Good Doctor ' score big in premiere week broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved October 13, 2017. Jump up ^ Porter, Rick ( October 18, 2017 ). `` ' The Orville, ' ' Once Upon a Time, ' 5 more shows double in week 2 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved October 18, 2017. Jump up ^ Porter, Rick ( October 25, 2017 ). `` ' The Good Doctor ' is the most - watched show on TV in week 3 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved October 25, 2017. Jump up ^ Porter, Rick ( November 2, 2017 ). `` ' Chicago PD, ' 10 more shows double in week 4 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved November 2, 2017. Jump up ^ Porter, Rick ( November 9, 2017 ). `` ' Grey 's Anatomy ' keeps rolling along in week 5 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved November 13, 2017. Jump up ^ Porter, Rick ( November 17, 2017 ). `` ' This Is Us ' and 12 more shows double in week 6 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved November 22, 2017. Jump up ^ Porter, Rick ( November 27, 2017 ). `` ' This Is Us ' rides high in week 7 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved November 27, 2017. Jump up ^ Porter, Rick ( December 5, 2017 ). `` ' Jane the Virgin, ' 10 other shows double in week 8 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved December 5, 2017. Jump up ^ Porter, Rick ( December 15, 2017 ). `` CW crossovers get another bump in week 10 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved December 15, 2017. Jump up ^ Porter, Rick ( December 21, 2017 ). `` ' Agents of SHIELD ' gets a good bump in week 11 broadcast Live + 7 ratings ''. TV By The Numbers. Retrieved January 2, 2017. Jump up ^ Porter, Rick ( January 12, 2018 ). `` ' 9 - 1 - 1 ' premiere gets a good boost in the week 15 broadcast Live + 3 ratings ''. TV by the Numbers. Retrieved January 12, 2018. Jump up ^ Porter, Rick ( January 26, 2018 ). `` ' The Brave ' goes from low to... less low : Week 16 broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved January 26, 2018. Jump up ^ Porter, Rick ( February 1, 2018 ). `` ' This Is Us, ' ' The Good Doctor ' both double in week 17 broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved March 14, 2018. Jump up ^ Porter, Rick ( February 15, 2018 ). `` Closing the book on the Super Bowl ' This Is Us ' : Week 19 broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved March 14, 2018. Jump up ^ Porter, Rick ( March 15, 2018 ). `` ' Agents of SHIELD, ' 16 other shows double in week 23 broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved March 16, 2018. Jump up ^ Porter, Rick ( March 22, 2018 ). `` ' This Is Us ' leads the week 24 broadcast Live + 7 ratings -- by quite a bit ''. TV by the Numbers. Retrieved March 22, 2018. Jump up ^ Porter, Rick ( April 11, 2018 ). `` ' Roseanne ' premiere sets a record in week 27 broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved April 11, 2018. Jump up ^ Porter, Rick ( April 19, 2018 ). `` ' Will & Grace ' finale, 11 other shows double in week 28 broadcast Live + 7 ratings ''. TV by the Numbers. Retrieved April 19, 2018. General references `` Shows A-Z -- big bang theory, the on CBS ''. The Futon Critic. Retrieved August 14, 2014. `` The Big Bang Theory : Episode Guide ''. MSN TV. Retrieved August 14, 2014. `` The Big Bang Theory Episode Guide ''. Zap2It. Retrieved August 14, 2014. External links List of The Big Bang Theory episodes on IMDb The Big Bang Theory : Season 11 at Rotten Tomatoes The Big Bang Theory Characters Leonard Hofstadter Sheldon Cooper Penny Howard Wolowitz Raj Koothrappali Episodes Season 1 `` Pilot '' Season 2 `` The Terminator Decoupling '' Season 3 `` The Jiminy Conjecture '' Season 4 `` The Cruciferous Vegetable Amplification '' `` The Hot Troll Deviation '' `` The Love Car Displacement '' `` The Toast Derivation '' `` The Roommate Transmogrification '' Season 5 `` The Skank Reflex Analysis '' `` The Infestation Hypothesis '' `` The Wiggly Finger Catalyst '' `` The Russian Rocket Reaction '' `` The Rhinitis Revelation '' `` The Good Guy Fluctuation '' `` The Isolation Permutation '' `` The Flaming Spittoon Acquisition '' `` The Shiny Trinket Maneuver '' `` The Recombination Hypothesis '' `` The Beta Test Initiation '' `` The Werewolf Transformation '' `` The Hawking Excitation '' `` The Stag Convergence '' `` The Countdown Reflection '' Season 6 `` The Fish Guts Displacement '' `` The Santa Simulation '' `` The Egg Salad Equivalency '' Season 7 `` The Hofstadter Insufficiency '' `` The Convention Conundrum '' Season 8 `` The Locomotion Interruption '' Season 9 Season 10 Season 11 Recurring concepts `` Soft Kitty '' Related articles Awards and nominations Bazinga ( jellyfish ) Euglossa bazinga Young Sheldon Portal Book Retrieved from `` https://en.wikipedia.org/w/index.php?title=The_Big_Bang_Theory_(season_11)&oldid=837286874 '' Categories : 2017 American television seasons 2018 American television seasons The Big Bang Theory seasons Hidden categories : Use mdy dates from September 2017 Talk Contents About Wikipedia Wikiquote Čeština Deutsch Español Français Italiano Português Русский 中文 Edit links This page was last edited on 19 April 2018, at 21 : 51. 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Question: the big bang theory season 11 episode 12 air date
Answer: January 4, 2018