Spoiler: 10/09/17 episode AMY RECORDS SHELDON TALKING IN HIS SLEEP AND TRIES TO CONVINCE HIM HE CAN BE MORE EASYGOING, ON "THE BIG BANG THEORY," MONDAY, OCT. 9 Amy tells Sheldon he talks in his sleep! "The Relaxation Integration" – As Sheldon stresses about picking a wedding date, Amy tries to convince him he has a more laid-back side. Also, Koothrappali and Stuart compete to win the heart of Bernadette's new coworker, Ruchi (Swati Kapila), on Monday, Oct. 9 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Laid back Sheldon? Amy records Sheldon talking in his sleep & sees another side of him @BigBangTheory #CBS 10/9 8pm http://bit.ly/2yM04Kq REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart) GUEST CAST: Swati Kapila (Ruchi) STORY BY: Chuck Lorre, Steve Holland, Adam Faberman TELEPLAY BY: Maria Ferrari, Andy Gordon, Tara Hernandez DIRECTED BY: Mark Cendrowski
10/16/17 episode WOLOWITZ AND SHELDON BOND OVER THEIR RELATIONSHIPS WITH THEIR DISAPPOINTING FATHERS, ON "THE BIG BANG THEORY," MONDAY, OCT. 16 Sheldon & Wolowitz Christine Baranski Returns as Leonard's Mother, Beverly "The Explosion Implosion" – Wolowitz and Sheldon bond when they drive to the desert to shoot off a model rocket. Also, when Leonard's mom, Beverly (Christine Baranski), finds a new best friend in Penny, it rubs Leonard the wrong way, on THE BIG BANG THEORY, Monday, Oct. 16 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Wolowitz & Sheldon bond over their relationships with their disappointing fathers @BigBangTheory #CBS 10/16 8pm http://bit.ly/2hQTWMS REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Christine Baranski (Dr. Beverly Hofstadter) GUEST CAST: Dana L. Wilson (Dr. Samuels) Michael Patrick McGill (Police Officer) STORY BY: Bill Prady, Maria Ferrari, Tara Hernandez TELEPLAY BY: Steve Holland, Eric Kaplan, Jeremy Howe DIRECTED BY: Mark Cendrowski 10/23/17 episode PENNY FIGURES OUT THE 'SECRET' TO SHELDON, ON "THE BIG BANG THEORY," MONDAY, OCT. 23 Penny figures out Sheldon's 'secret'! "The Collaboration Contamination" – Sheldon and Koothrappali confide in Bernadette when they can't handle Amy and Wolowitz working together. Also, Penny and Leonard learn new tactics for how to deal Sheldon from an unlikely source, on THE BIG BANG THEORY, Monday, Oct. 23 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Penny & Leonard learn new tactics for how to deal with Sheldon on @BigBangTheory #CBS 10/23 8pm http://bit.ly/2yk1f5T REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) GUEST CAST: Efrain Gomez (Employee) STORY BY: Steven Molaro, Steve Holland, Eric Kaplan TELEPLAY BY: Dave Goetsch, Maria Ferrari, Jeremy Howe DIRECTED BY: Nikki Lorre
Spoiler: 11/02/17 episode SHELDON AUDITIONS TO BE THE NEW PROFESSOR PROTON, WHEN "THE BIG BANG THEORY" MOVES TO ITS REGULAR TIME PERIOD, THURSDAY, NOV. 2 Sheldon tries out his Professor Proton persona for Amy Emmy Award Winner Bob Newhart and Wil Wheaton Return to Guest Star "The Proton Regeneration" – Sheldon goes head-to-head with Wil Wheaton for the role of the new Professor Proton. Also, Penny steps in to take care of Halley when Bernadette and Wolowitz both wind up on bed rest, when THE BIG BANG THEORY moves to its regular time period, Thursday, Nov. 2 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Sheldon battles @WilWheaton for the role of the new Professor Proton when @BigBangTheory moves to Thursdays 11/2 8pm http://bit.ly/2yBkJ6g REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Bob Newhart (Arthur Jeffries) Wil Wheaton (Himself) Pamela Adlon (Halley Wolowitz, [voice]) GUEST CAST: Cat Hammons (Nurse) STORY BY: Steven Molaro, Dave Goetsch, Alex Yonks TELEPLAY BY: Steve Holland, Andy Gordon, Jeremy Howe DIRECTED BY: Mark Cendrowski
Spoiler: 11/09/17 episode SHELDON TRIES TO KEEP HIS GEOLOGY COLLABORATION WITH BERT A SECRET, ON "THE BIG BANG THEORY," THURSDAY, NOV. 9 "The Geology Methodology" – Sheldon and Bert collaborate on a research project, despite Sheldon's embarrassment. Also, Penny and Bernadette coach Koothrappali on how to navigate his relationship with Ruchi (Swati Kapila), on THE BIG BANG THEORY, Thursday, Nov. 9 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Shh! Sheldon tries to keep his geology collaboration with Bert a secret @BigBangTheory Thurs. 11/9 8pm #CBS http://bit.ly/2yT4NfL REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart) Brian Posehn (Bert) Swati Kapila (Ruchi) GUEST CAST: Elka Rodriguez (Rose Lady) STORY BY: Steve Holland, Anthony Del Broccolo, Adam Faberman TELEPLAY BY: Eric Kaplan, Maria Ferrari, Tara Hernandez DIRECTED BY: Mark Cendrowski
Spoiler: 11/16/17 episode LEONARD AND WOLOWITZ GO TO BARRY KRIPKE FOR HELP AFTER SHELDON BETRAYS THEM, ON "THE BIG BANG THEORY," THURSDAY, NOV. 16 Dean Norris Returns as Colonel Williams "The Tesla Recoil" – Leonard and Wolowitz are furious after they learn Sheldon went to work with the military behind their backs. Also, while Bernadette is on bed rest, she asks Raj to do some digging when she suspects Ruchi is trying to steal her job, on THE BIG BANG THEORY, Thursday, Nov. 16 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Leonard & Wolowitz are furious after they learn Sheldon is working w/ the military. @BigBangTheory Thurs. 11/16 8pm http://bit.ly/2yTCf5G REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: John Ross Bowie (Barry Kripke) Dean Norris (Colonel Richard Williams) Swati Kapila (Ruchi) STORY BY: Chuck Lorre, Eric Kaplan, Tara Hernandez TELEPLAY BY: Steve Holland, Maria Ferrari, Jeremy Howe DIRECTED BY: Anthony Rich
Spoiler: 11/30/17 episode THE GANG FLASHES BACK TO 2010 AS LEONARD TRIES TO REMEMBER WHERE HE KEPT A POTENTIALLY VALUABLE INVESTMENT, ON "THE BIG BANG THEORY," THURSDAY, NOV. 30 "The Bitcoin Entanglement" – Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable Bitcoin investment. Also, a seven-year-old video reveals a secret about Leonard and Penny's relationship, on THE BIG BANG THEORY, Thursday, Nov. 30 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: The gang flashes back to 2010 & Leonard tries to remember where he kept a valuable investment. @BigBangTheory 11/30 8pm http://bit.ly/2A4XJ0W REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart) Brian Thomas Smith (Zack) STORY BY: Steve Holland, Andy Gordon, Jeremy Howe TELEPLAY BY: Dave Goetsch, Maria Ferrari, Anthony Del Broccolo DIRECTED BY: Mark Cendrowski
Spoiler: 12/07/17 episode SHELDON AND AMY DEVELOP A UNIQUE SYSTEM FOR WEDDING PLANNING, ON "THE BIG BANG THEORY," THURSDAY, DEC. 7 "The Confidence Erosion" – Sheldon and Amy try to eliminate stress from wedding planning by applying math to the process. Also, Koothrappali "breaks up" with Wolowitz after realizing his best friend is actually hurting his confidence, on THE BIG BANG THEORY, Thursday, Dec. 7 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Koothrappali & Wolowitz "break up" after Raj realizes his best friend is actually hurting his confidence on @BigBangTheory #CBS 12/7 8pm http://bit.ly/2z4lv96 REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart Bloom) Brian George (Dr. V.M. Koothrappali) GUEST CAST: Marissa Cuevas (Danielle) Brooke Baumer (Denise) Nicole Butler (Clerk) STORY BY: Bill Prady, Maria Ferrari, Adam Faberman TELEPLAY BY: Steve Holland, Eric Kaplan, Tara Hernandez DIRECTED BY: Mark Cendrowski
Spoiler: 12/14/17 episode SHELDON PLANS AN AUTHENTIC "LITTLE HOUSE ON THE PRAIRIE" DINNER FOR AMY'S BIRTHDAY, ON "THE BIG BANG THEORY," THURSDAY, DEC. 14 "The Celebration Reverberation" – Sheldon and Wolowitz plan birthday celebrations for Amy and Halley, respectively. Also, Leonard receives a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments, on THE BIG BANG THEORY, Thursday, Dec. 14 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Sheldon & Wolowitz plan birthday celebrations for Amy & Halley and Leonard receives a Christmas letter from his brother @BigBangTheory #CBS 12/14 8pm http://bit.ly/2zTjAcc REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart Bloom) Pamela Adlon (Halley Wolowitz, [voice]) STORY BY: Steve Holland, Eric Kaplan, Alex Ayers TELEPLAY BY: Dave Goetsch, Maria Ferrari, Jeremy Howe DIRECTED BY: Mark Cendrowski
1/04/18 episode SHELDON AND AMY TRY TO USE SCIENCE TO DECIDE WHO WILL BE THEIR MAID OF HONOR AND BEST MAN, ON "THE BIG BANG THEORY," THURSDAY, JAN. 4 Will science help Sheldon & Amy decide who will be in their wedding party? "The Matrimonial Metric" – To discover who would be most qualified to be best man and maid of honor at their wedding, Sheldon and Amy subject their friends to a series of secret experiments. Also, Penny reveals her true feelings about Amy, on THE BIG BANG THEORY, Thursday, Jan. 4 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Sheldon & Amy try to use science to decide who will be their maid of honor & best man @BigBangTheory #CBS 1/4 8pm http://bit.ly/2yiRIZ9 REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart Bloom) STORY BY: Maria Ferrari & Tara Hernandez & Jeremy Howe TELEPLAY BY: Steve Holland & Eric Kaplan & Andy Gordon DIRECTED BY: Mark Cendrowski
Spoiler: 1/11/18 episode PENNY HELPS SHELDON FIGURE OUT HIS NEXT MOVE IN SCIENCE, ON "THE BIG BANG THEORY," THURSDAY, JAN. 11 Laurie Metcalf Returns as Sheldon's Mother, Mary "The Solo Oscillation" – When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Also, Bert the geologist replaces Wolowitz in the band Footprints on the Moon, and Sheldon finds Penny a surprising source of scientific inspiration, on THE BIG BANG THEORY, Thursday, Jan. 11 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Laurie Metcalf returns as Sheldon's mother, Mary. CHEAT TWEET: Penny helps Sheldon figure out his next move in science @BigBangTheory #CBS 1/11 8pm #LaurieMetcalf returns as Sheldon's mom! http://bit.ly/2BfrWY1 REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Laurie Metcalf (Mary Cooper) Brian Posehn (Bert Kibbler) Pamela Adlon (Halley Wolowitz, [voice]) STORY BY: Chuck Lorre & Steve Holland & Anthony Del Broccolo TELEPLAY BY: Eric Kaplan & Maria Ferrari & Jeremy Howe DIRECTED BY: Mark Cendrowski
1/18/18 episode KOOTHRAPPALI IS CAUGHT BETWEEN A ROCK AND A HARD PLACE WHEN HE DISCOVERS HE'S DATING A MARRIED WOMAN, ON "THE BIG BANG THEORY," THURSDAY, JAN. 18 Walton Goggins and Beth Behrs Guest Star as Husband and Wife, Oliver and Nell "The Separation Triangulation" – Koothrappali finds himself in the middle of domestic drama when he learns the woman he's dating, Nell (Beth Behrs), has a very upset husband, Oliver (Walton Goggins). Also, when Sheldon rents his old room back for a quiet place to work, he drives Leonard crazy by being a model tenant, on THE BIG BANG THEORY, Thursday, Jan. 18 (8:00-8:31 PM, ET/PT) on the CBS Television Network. CHEAT TWEET: Koothrappali is caught between a rock and a hard place when he discovers he is dating a married woman! @BethBehrs & #WaltonGoggins Guest Star @BigBangTheory #CBS 1/18 8pm http://bit.ly/2CS22h5 REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) GUEST CAST: Walton Goggins (Oliver) Beth Behrs (Nell) STORY BY: Chuck Lorre & Eric Kaplan & Maria Ferrari TELEPLAY BY: Steven Molaro & Steve Holland & Tara Hernandez DIRECTED BY: Mark Cendrowski
Spoiler: 2/01/18 episode LEONARD FINDS HIMSELF IN AN AWKWARD SPOT AFTER HE ASKS HIS FRIENDS FOR FEEDBACK ON HIS NOVEL, ON "THE BIG BANG THEORY," THURSDAY, FEB. 1 Wil Wheaton is Professor Proton Christine Baranski and Wil Wheaton Return to Guest Star "The Novelization Correlation" – When Sheldon petitions Wil Wheaton to appear on the new Professor Proton show, Wil offers a role to Amy instead. Also, Penny gets angry when she thinks the female protagonist in Leonard's novel is based on her, on THE BIG BANG THEORY, Thursday, Feb. 1 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Christine Baranski and Wil Wheaton return to guest star. CHEAT TWEET: Sheldon petitions Wil Wheaton to appear on the new Professor Proton show but @wilw offers a role to Amy instead on @BigBangTheory #CBS 2/1 8pm http://bit.ly/2DP5aLk REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart Bloom) Christine Baranski (Dr. Beverly Hofstadter) Wil Wheaton (Himself) STORY BY: Steve Holland & Andy Gordon & Adam Faberman TELEPLAY BY: Eric Kaplan & Maria Ferrari & Jeremy Howe DIRECTED BY: Mark Cendrowski
Spoiler: 3/01/18 episode BERNADETTE GIVES BIRTH, ON "THE BIG BANG THEORY," THURSDAY, MARCH 1 "The Neonatal Nomenclature" – When Bernadette won't go into labor, all her friends try different tactics to get things started. Also, Wolowitz confronts Bernadette after Amy accidentally reveals she's already chosen their son's name, on THE BIG BANG THEORY, Thursday, March 1 (8:00-8:31 PM, ET/PT), on the CBS Television Network. CHEAT TWEET: Massages? Yoga? Spicy Food? When Bernadette won't go into labor, all her friends try different tactics to help get things started! @BigBangTheory #CBS 3/1 8pm http://bit.ly/2sbDsUb REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) STORY BY: Eric Kaplan & Maria Ferrari & Anthony Del Broccolo TELEPLAY BY: Steve Holland & Tara Hernandez & Adam Faberman DIRECTED BY: Gay Linvill
Spoiler: 3/08/18 episode SHELDON AND AMYS WEDDING PLANS HIT A SNAG IN THE FORM OF BARRY KRIPKE, ON "THE BIG BANG THEORY," THURSDAY, MARCH 8 John Ross Bowie Returns as Kripke "The Athenaeum Allocation" – Leonard jumps through hoops to help secure the perfect wedding venue for Sheldon and Amy. Also, Bernadette and Wolowitz have a hard time deciding who should stay at home with the kids and who should go back to work, on THE BIG BANG THEORY, Thursday, March 8 (8:00-8:31 PM, ET/PT) on the CBS Television Network. John Ross Bowie returns as Kripke. CHEAT TWEET: Sheldon & Amy's wedding plans hit a snag because of Kripke.@JohnRossBowie returns @BigBangTheory #CBS 3/8 8pm http://bit.ly/2o0WtDv REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: John Ross Bowie (Kripke) GUEST CAST: Rachna Khatau (Kathleen) Caleb Pierce (Jess) STORY BY: Steve Holland & Steven Molaro & Tara Hernandez TELEPLAY BY: Dave Goetsch & Eric Kaplan & Maria Ferrari DIRECTED BY: Mark Cendrowski
Spoiler: 3/29/18 episode PHILANTHROPIST BILL GATES MAKES AN APPEARANCE, ON "THE BIG BANG THEORY," THURSDAY, MARCH 29 "The Gates Excitation" – Penny gets the opportunity to host Bill Gates at work when his company wants to partner with her pharmaceutical company. Also, Leonard, Koothrappali and Wolowitz do everything in their power to meet him, while Sheldon thinks he is the victim of an April Fools prank, on THE BIG BANG THEORY, Thursday, March 29 (8:00-8:31 PM, ET/PT), on the CBS Television Network. CHEAT TWEET: Penny gets the opportunity to host @BillGates at work and the guys do everything in their power to meet him! @BigBangTheory #CBS 3/29 8pm http://bit.ly/2oUGesW REGULAR CAST: Johnny Galecki (Leonard Hofstadter) Jim Parsons (Sheldon Cooper) Kaley Cuoco (Penny Hofstadter) Simon Helberg (Howard Wolowitz) Kunal Nayyar (Raj Koothrappali) Mayim Bialik (Amy Farrah Fowler) Melissa Rauch (Bernadette Rostenkowski) RECURRING CAST: Kevin Sussman (Stuart Bloom) GUEST CAST: Eileen Galindo (Letty) Bill Gates (Himself) STORY BY: Eric Kaplan & Maria Ferrari & Andy Gordon TELEPLAY BY: Steve Holland & Tara Hernadnez & Jeremy Howe DIRECTED BY: Mark Cendrowski