The Big Bang Theory: Season 12

2018 · 24 episodes · ★ 7.1

What Season 12 of The Big Bang Theory

The final season of The Big Bang Theory begins with Sheldon and Amy newlywed and on their honeymoon, although married life tests Sheldon's routines. Leonard and Penny start to consider starting a family, Bernadette and Howard take care of their kids, and Raj tries to patch things up with Anu. Sheldon and Amy chase the Nobel Prize, an award that seems closer every day, and Amy feels the pressure of being a woman on that path. Academic rivalries, such as a possible thesis plagiarism case, mix with Raj's doubts about his credibility after an article about extraterrestrial life.

24episodes

Sep 24, 2018premiered

May 16, 2019latest episode

8.6 hrtotal runtime

Season 12 Episodes

12x01 The Conjugal Configuration
Sep 24, 2018 · 20 min · ★ 9.9
Sheldon and Amy's honeymoon runs aground in New York. Penny and Leonard discover they are uncomfortably similar to Amy's parents. Raj insults physicist Neil deGrasse Tyson and starts a Twitter war.
Directing: Mark Cendrowski · Writing: Steve Holland, Maria Ferrari, Jeremy Howe · Starring: Bill Nye, Neil deGrasse Tyson, Giovanni Bejarano, Ciara Renée
12x02 The Wedding Gift Wormhole
Sep 27, 2018 · 21 min · ★ 7.3
Sheldon and Amy drive themselves crazy trying to figure out what 'perfect gift' Leonard and Penny gave them for their wedding. Raj decides he wants to settle down and asks his father to arrange a marriage for him.
Directing: Mark Cendrowski · Writing: David Goetsch, Eric Kaplan, Andy Gordon · Starring: Kevin Sussman, Brian George, Luis Aldana, Kikey Castillo
12x03 The Procreation Calculation
Oct 4, 2018 · 20 min · ★ 6.9
The Wolowitzes' life gets complicated when Stuart starts bringing his new girlfriend home. Also, Penny and Leonard talk about starting a family, while Raj explores an arranged marriage.
Directing: Mark Cendrowski · Writing: Steve Holland, Maria Ferrari, Anthony Del Broccolo · Starring: Kevin Sussman, Matt Knudsen, Keith Carradine, Lauren Lapkus
12x04 The Tam Turbulence
Oct 11, 2018 · 19 min · ★ 6.9
When Sheldon won't tell anyone why he's never mentioned his childhood best friend, Leonard takes matters into his own hands. Bernadette and Penny take out Raj’s fiancée for dinner to get the skinny on her.
Directing: Mark Cendrowski · Writing: David Goetsch, Eric Kaplan, Jeremy Howe · Starring: Robert Wu, Jerry O'Connell, Rati Gupta
12x05 The Planetarium Collision
Oct 18, 2018 · 19 min · ★ 6.7
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 it if means accidentally sabotaging her career in the process. Raj doesn’t want Howard to join him in hosting a show at the planetarium.
Directing: Mark Cendrowski · Writing: Tara Hernandez, Steve Holland, Maria Ferrari · Starring: Eddie Shin, Alison Martin, Hermie Castillo, Joshua Malina
12x06 The Imitation Perturbation
Oct 25, 2018 · 20 min · ★ 7.3
When Howard dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Leonard is shocked that Penny doesn't remember their first kiss.
Directing: Mark Cendrowski · Writing: Eric Kaplan, Adam Faberman, Jeremy Howe · Starring: Kevin Sussman, Pamela Adlon, David Theune, Rati Gupta
12x07 The Grant Allocation Derivation
Nov 1, 2018 · 20 min · ★ 6.9
Leonard is caught between a rock and a hard place when he's responsible for distributing extra grant money. Bernadette turns the backyard playhouse into a hideaway from Howard and the kids.
Directing: Mark Cendrowski · Writing: Steve Holland, David Goetsch, Maria Ferrari · Starring: John Ross Bowie, Maribeth Monroe, Joshua Malina
12x08 The Consummation Deviation
Nov 8, 2018 · 22 min · ★ 6.9
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. Raj and Anu try to get physical for the first time.
Directing: Mark Cendrowski · Writing: Eric Kaplan, Adam Faberman, Andy Gordon · Starring: Kevin Sussman, Kathy Bates, Teller, Rati Gupta
12x09 The Citation Negation
Nov 15, 2018 · 21 min · ★ 6.9
Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been theorized and disproven. Meanwhile, ultra-competitive Bernadette asks Stuart’s girlfriend to teach her how to beat Howard in a popular video game.
Directing: Kristy Cecil · Writing: Steve Holland, David Goetsch, Maria Ferrari · Starring: Lauren Lapkus
12x10 The VCR Illumination Mid-Season Finale
Dec 6, 2018 · 21 min · ★ 7.0
Sheldon and Amy are still down about their theory being disproven, but a VHS tape from Sheldon’s past inspires him not to give up. Bernadette turns into a pageant mom when she tries to help Howard ace his Magic Castle audition.
Directing: Mark Cendrowski · Writing: Maria Ferrari, Jeremy Howe, Andy Gordon · Starring: Iain Armitage, Lance Barber, Montana Jordan, Kurt Scholler
12x11 The Paintball Scattering
Jan 3, 2019 · 20 min · ★ 6.9
Penny and Leonard organize a paintball game that results in mayhem when Sheldon is jealous of Amy. Also, Raj catches Anu with her ex-boyfriend, and Stuart gets cold feet when Denise hints at the possibility of them living together.
Directing: Mark Cendrowski · Writing: Steve Holland, Eric Kaplan, Anthony Del Broccolo · Starring: Kevin Sussman, Hira Ambrosino, Hugh Kennedy, Lauren Lapkus
12x12 The Propagation Proposition
Jan 10, 2019 · 20 min · ★ 6.7
Penny runs into her ex-boyfriend, Zack, who invites her and Leonard to a dinner to meet his newlywed wife. After the dinner the newlywed couple make an odd proposition to Leonard, which makes Penny to freak out. Also, Raj attempts to mend things with his ex-fiancée, Anu.
Directing: Mark Cendrowski · Writing: David Goetsch, Eric Kaplan, Maria Ferrari · Starring: Brian George, Brian Thomas Smith, Rati Gupta, Shay Ali
12x13 The Confirmation Polarization
Jan 17, 2019 · 21 min · ★ 6.7
Sheldon and Amy are thrilled when their super asymmetry theory is proven by two physicists, until they try to kick Amy off the Nobel nomination. Also, Bernadette gets one of her drugs approved at work and wants a reluctant Penny to head the sales team.
Directing: Mark Cendrowski · Writing: Steve Holland, Tara Hernandez, Maria Ferrari · Starring: Keili Lefkovitz, Chasty Ballesteros, Kal Penn, Sean Astin
12x14 The Meteorite Manifestation
Jan 31, 2019 · 20 min · ★ 6.6
Sheldon is thrilled to help Bernadette and Wolowitz navigate bureaucratic paperwork, until he discovers they are breaking the law. Also, Leonard is disappointed when his friends exclude him from a scientific project.
Directing: Mark Cendrowski · Writing: Tara Hernandez, Eric Kaplan, Jeremy Howe · Starring: Kevin Sussman, Andy Daly, Joel McCrary, Lauren Lapkus
12x15 The Donation Oscillation
Feb 7, 2019 · 22 min · ★ 6.8
Penny tries to seduce an abstaining Leonard to ruin his "donation" for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip.
Directing: Mark Cendrowski · Writing: Steve Holland, David Goetsch, Maria Ferrari · Starring: Keith Carradine, Eric Nenninger, Brian Thomas Smith, Rati Gupta
12x16 The D & D Vortex
Feb 21, 2019 · 21 min · ★ 7.3
The gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game involving William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith. Deception and betrayal are the path to make it to the one open seat.
Directing: Mark Cendrowski · Writing: Tara Hernandez, Eric Kaplan, Andy Gordon · Starring: Kevin Sussman, Wil Wheaton, Joe Manganiello, Kareem Abdul-Jabbar
12x17 The Conference Valuation
Mar 7, 2019 · 20 min · ★ 6.6
When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is in charge of the kids. Also, Sheldon finds a book on experimenting on kids, and the guys plus Amy make a day of it.
Directing: Mark Cendrowski · Writing: Steve Holland, Maria Ferrari, Jeremy Howe · Starring: Kevin Sussman, Jason Kravits, Chasty Ballesteros, Ben Rauch
12x18 The Laureate Accumulation
Apr 4, 2019 · 22 min · ★ 6.9
When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates Kip Thorne, George Smoot and Frances Arnold to their side. Also, Halley's fear of the dark causes opportunity and conflict at the Wolowitz home.
Directing: Mark Cendrowski · Writing: David Goetsch, Eric Kaplan, Maria Ferrari · Starring: Kevin Sussman, Pamela Adlon, Kal Penn, Sean Astin
12x19 The Inspiration Deprivation
Apr 18, 2019 · 21 min · ★ 6.5
The concept of what it would mean for women everywhere if Amy were to win a Nobel Prize causes Amy to have a meltdown. Also, Howard and Raj try to relive the good old days after Howard buys a scooter that looks like the one he had years ago.
Directing: Mark Cendrowski · Writing: Steve Holland, Tara Hernandez, Anthony Del Broccolo · Starring: Brooke Dillman, Regina King, Doreen Calderon, Sarah Eagen
12x20 The Decision Reverberation
Apr 25, 2019 · 20 min · ★ 6.6
Raj is worried people won’t take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Also, Leonard wants to be the principal investigator on a plasma physics study.
Directing: Mark Cendrowski · Writing: Eric Kaplan, Maria Ferrari, Jeremy Howe · Starring: David Theune, Angela Lin, Elijah Isaiah Cook, Joshua Malina
12x21 The Plagiarism Schism
May 2, 2019 · 20 min · ★ 6.9
Kripke has proof that Dr. Pemberton plagiarized his thesis in college, and Sheldon and Amy aren't sure if they should turn him in or not. Meanwhile, Howard learns that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him.
Directing: Nikki Lorre · Writing: Steve Holland, Tara Hernandez, David Goetsch · Starring: John Ross Bowie, Kal Penn, Sean Astin, Joshua Malina
12x22 The Maternal Conclusion
May 9, 2019 · 21 min · ★ 7.3
Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him, until he finds out the real reason she's there. Also, Denise and Stuart overstay their welcome at the Wolowitz house.
Directing: Kristy Cecil · Writing: Maria Ferrari, Anthony Del Broccolo, Andy Gordon · Starring: Kevin Sussman, Todd Giebenhain, Lauren Lapkus, Rati Gupta
12x23 The Change Constant / The Stockholm Syndrome Season Finale
May 16, 2019 · 42 min · ★ 8.0
Sheldon and Amy await big news. Meanwhile, Penny and Leonard have some big news of their own. Also, Howard and Bernadette face the stressful challenge of leaving their kids for the first time and Raj makes a new friend, as the gang travels together into an uncharted future.
Directing: Mark Cendrowski · Writing: Chuck Lorre, Eric Kaplan, Bill Prady · Starring: Kevin Sussman, John Ross Bowie, Blair Hickey, Dinora Walcott
12x24 Unraveling the Mystery: A Big Bang Farewell Season Finale
May 16, 2019 · 24 min · ★ 8.0
Johnny Galecki and Kaley Cuoco will lead fans on a trip down memory lane, sharing some of the best-kept backstage secrets and personal memories from the past 12 years.
Writing: Chuck Lorre