The Big Bang Theory

The Big Bang Theory

Now that Sheldon has married to neurobiologist Amy Farrah Fowler, he’ll have to make some additions to the “Relationship Agreement.” Will their equation for marital bliss alter the chemistry between these two beautiful minds? Quantum comedy converges in the twelfth dimension!
Now that Sheldon has married to neurobiologist Amy Farrah Fowler, he’ll have to make some additions to the “Relationship Agreement.” Will their equation for marital bliss alter the chemistry between these two beautiful minds? Quantum comedy converges in the twelfth dimension!

Season 12 (26 episodes)

  • 1. The Conjugal Configuration

    Original air date: 09/24/2018 Runtime: 20:31 min.

    Original air date: 09/24/2018 Runtime: 20:31 min. In the twelfth season premiere, Sheldon and Amy’s honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy’s parents; Meanwhile Raj insults physicist NEIL DEGRASSE TYSON and starts a Twitter war. KATHY BATES and TELLER return as Amy’s parents.

  • 2. The Wedding Gift Wormhole

    Original air date: 09/27/2018 Runtime: 21:06 min.

    Original air date: 09/27/2018 Runtime: 21:06 min. Sheldon and Amy drive themselves crazy trying to figure out what “perfect gift” Leonard and Penny got them for their wedding. Meanwhile, Raj decides he wants to settle down and asks his father to find him an arranged marriage.

  • 3. The Procreation Calculation

    Original air date: 10/04/2018 Runtime: 20:22 min.

    Original air date: 10/04/2018 Runtime: 20:22 min. Howard and Bernadette’s life gets complicated when Stuart (series regular KEVIN SUSSMAN) starts bringing his new girlfriend home; Meanwhile, Penny and Leonard talk about starting a new family, as Raj explores an arranged marriage.

  • 4. The Tam Turbulence

    Original air date: 10/11/2018 Runtime: 18:56 min.

    Original air date: 10/11/2018 Runtime: 18:56 min. When Sheldon won’t tell anyone why he’s never mentioned Tam (guest star ROBERT WU), his childhood best friend, Leonard takes matters into his own hands. Also, Bernadette and Penny take out Raj’s fiancée, Anu (guest star RATI GUPTA), for dinner to get all the details on her. JERRY O’CONNELL returns as Sheldon’s brother, George.

  • 5. The Planetarium Collision

    Original air date: 10/18/2018 Runtime: 18:51 min.

    Original air date: 10/18/2018 Runtime: 18:51 min. When Amy doesn’t have time to work on super-asymmetry, Sheldon goes to great lengths to ensure she’s available to work with him even if it means accidentally sabotaging her career in the process.Meanwhile, Raj doesn’t want Howard to join him in hosting a show at the planetarium. BOB NEWHART returns as Arthur Jeffries.

  • 6. The Imitation Perturbation

    Original air date: 10/25/2018 Runtime: 19:14 min.

    Original air date: 10/25/2018 Runtime: 19:14 min. When Howard dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny’s Halloween party; Meanwhile, Leonard is shocked that Penny doesn't remember their first kiss.

  • 7. The Grant Allocation Derivation

    Original air date: 11/01/2018 Runtime: 19:14 min.

    Original air date: 11/01/2018 Runtime: 19:14 min. Leonard is caught between a rock and a hard place when he’s responsible for distributing extra grant money. Also, Bernadette turns the backyard playhouse into a hideaway from her husband and kids.

  • 8. The Consummation Deviation

    Original air date: 11/08/2018 Runtime: 21:01 min.

    Original air date: 11/08/2018 Runtime: 21:01 min. Sheldon tries to bond with Amy’s father. But when Howard lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler. Meanwhile, Raj and Anu attempt to get physical.

  • 9. The Citation Negation

    Original air date: 11/15/2018 Runtime: 20:19 min.

    Original air date: 11/15/2018 Runtime: 20:19 min. Sheldon and Amy are devastated to learn from a Russian paper that Super-Asymmetry has already been discovered and disproven. Meanwhile, ultra-competitive Bernadette asks Stuart’s girlfriend, Denise (recurring guest star LAUREN LAPKUS), to teach her how to play the videogame Fortnite.

  • 10. The VCR Illumination

    Original air date: 12/06/2018 Runtime: 20:46 min.

    Original air date: 12/06/2018 Runtime: 20:46 min. Sheldon and Amy are still down about their theory being disproven, but a VHS tape from Sheldon’s past inspires him to not give up. Also, Bernadette turns into a pageant mom when she tries to help Howard ace his Magic Castle audition. Special guest stars include Young Sheldon’s IAIN ARMITAGE, LANCE BARBER and MONTANA JORDAN. CHRISTINE BARANSKI returns as Leonard’s mother, Beverly.

  • 11. The Paintball Scattering

    Original air date: 01/03/2019 Runtime: 19:16 min.

    Original air date: 01/03/2019 Runtime: 19:16 min. Penny and Leonard organize a paintball game that results in mayhem, when Sheldon is jealous of Amy, Raj catches Anu with her ex-boyfriend, and Stuart doesn’t want to move in with Denise.

  • 12. The Propagation Proposition

    Original air date: 01/10/2019 Runtime: 19:51 min.

    Original air date: 01/10/2019 Runtime: 19:51 min. Penny’s old boyfriend, Zack (recurring guest star BRIAN THOMAS SMITH), and his wife want a baby, but when Zack is infertile, they ask Leonard to help. Meanwhile, Raj attempts to mend things with his ex-fiancée Anu.

  • 13. The Confirmation Polarization

    Original air date: 01/17/2019 Runtime: 20:06 min.

    Original air date: 01/17/2019 Runtime: 20:06 min. When Sheldon and Amy’s Super Asymmetry Theory is proven by two physicists from Chicago, they’re thrilled – until they try to kick Amy off their Nobel Prize nomination! Meanwhile, Bernadette has a big success at work and Penny’s going to be a part of it...whether she wants to or not.

  • 14. The Meteorite Manifestation

    Original air date: 01/31/2019 Runtime: 19:26 min.

    Original air date: 01/31/2019 Runtime: 19:26 min. Sheldon is thrilled to help Howard and Bernadette navigate bureaucratic paperwork...until he discovers they are breaking the law. Now, he’ll have to choose between following the rules of staying loyal to his friends. Meanwhile, Leonard is disappointed when his friends exclude him from a scientific project.

  • 15. The Donation Oscillation

    Original air date: 02/07/2019 Runtime: 21:06 min.

    Original air date: 02/07/2019 Runtime: 21:06 min. Penny tries to seduce an abstaining Leonard to ruin his “donation” for her ex-boyfriend, Zack, and his wife, Marissa (recurring guest star LINDSEY KRAFT). Meanwhile, Howard, Bernadette, Raj and Anu turn Raj’s canceled bachelor party into a “couple’s trip” aboard the “Vomit Comet.” Keith Carradine returns as Penny’s father, Wyatt.

  • 16. The D & D Vortex

    Original air date: 02/21/2019 Runtime: 20:01 min.

    Original air date: 02/21/2019 Runtime: 20:01 min. When the gang finds out that Wil Wheaton hosts a celebrity Dungeons & Dragons game involving WILLIAM SHATNER, JOE MANGANIELLO, NBA legend KAREEM ABDUL-JABBAR and director KEVIN SMITH, deception and betrayal are the path to make it to the one open seat.

  • 17. The Conference Valuation

    Original air date: 03/07/2019 Runtime: 19:31 min.

    Original air date: 03/07/2019 Runtime: 19:31 min. When Penny and Bernadette got to San Diego for a pharmaceutical sales convention, Howard is left in charge of the kids. But when Sheldon finds a book on experimenting with children, the guys and Amy make a day of it.

  • 18. The Laureate Accumulation

    Original air date: 04/04/2019 Runtime: 21:26 min.

    Original air date: 04/04/2019 Runtime: 21:26 min. When competitors Pemberton and Campbell (guest stars SEAN ASTIN and KAL PENN) charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates KIP THORNE, GEORGE SMOOT and FRANCES ARNOLD to their side (this episode sets the record for most Nobel laureates appearing in a comedy). Meanwhile, Halley’s fear of the dark leads to both opportunity and conflict for Howard, Bernadette and Stuart.

  • 19. The Inspiration Deprivation

    Original air date: 04/18/2019 Runtime: 20:11 min.

    Original air date: 04/18/2019 Runtime: 20:11 min. The concept of what it would mean for women everywhere if Amy were to win a Nobel Prize causes Amy to have a meltdown. Meanwhile, Raj and Howard try to relive the good old days when Howard buys a scooter that resembles the one he had years ago.

  • 20. The Decision Reverberation

    Original air date: 04/25/2019 Runtime: 19:01 min.

    Original air date: 04/25/2019 Runtime: 19:01 min. While Raj is worried that people won’t take him seriously in his own field after publishing a paper suggesting he may have discovered alien life, Penny encourages Leonard to stand up for himself when he wants to be the principal investigator on a plasma physics study.

  • 21. The Plagiarism Schism

    Original air date: 05/02/2019 Runtime: 19:51 min.

    Original air date: 05/02/2019 Runtime: 19:51 min. When Barry Kripke finds proof that Dr. Pemberton plagiarized his thesis in college, Sheldon and Amy aren’t sure if they should turn him in or not. And Howard is happily surprised to learn that Bernadette wasn’t the only waitress at The Cheesecake Factory who had a crush on him back in the day.

  • 22. The Maternal Conclusion

    Original air date: 05/09/2019 Runtime: 20:26 min.

    Original air date: 05/09/2019 Runtime: 20:26 min. Leonard is pleasantly surprised when his mother, Beverly, comes to visit and she’s genuinely kind toward him – until he finds out the real reason why she’s there; Meanwhile, Denise and Stuart overstay their welcome at the Wolowitz house.

  • 23. The Change Constant

    Original air date: 05/16/2019 Runtime: 19:49 min.

    Original air date: 05/16/2019 Runtime: 19:49 min. Everything changes as Sheldon and Amy await big news in the first of a two-part series finale.

  • 24. The Stockholm Syndrome

    Original air date: 05/16/2019 Runtime: 23:06 min.

    Original air date: 05/16/2019 Runtime: 23:06 min. It’s an end and a beginning on the second of a two-part series finale. Howard and Bernadette leave their kids for the first time; Leonard and Penny try to keep a secret; Sheldon and Amy stick together; and Raj makes a new friend as the gang travels together into an uncharted future.

  • 25. Unraveling the Mystery

    Original air date: 05/16/2019 Runtime: 21:13 min.

    Original air date: 05/16/2019 Runtime: 21:13 min. Johnny Galecki and Kaley Cuoco take a trip down memory lane, sharing some of the best-kept backstage secrets and personal memories from the past 12 years. They reveal their favorite moments playing Leonard and Penny, and revisit some of the most memorable stories from "The Big Bang Theory Stage." In addition, the special will feature a tour of the iconic sets, including Leonard and Sheldon's apartment.

  • 101. Best of The Big Bang Theory Comic-Con 2018 Panel

    Runtime: 39:27 min.

    Runtime: 39:27 min. **WITH SEASON PURCHASE ONLY** The writers and some of the cast gather together and answer questions for the fans at the 2018 San Diego Comic-Con.