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The Big Bang Theory Season 12 Episodes
Season 12 Episode Guide
24 Episodes 2018 - 2019
Season 12 of the comedy series brings some closure to the gang as they all move forward with their lives. Sheldon (Jim Parsons) and Amy (Mayim Bialik) struggle to adjust to married life, especially when Sheldon refuses any change; Leonard (Johnny Galecki) and Penny (Kaley Cuoco) discuss having children, and discover they have very different opinions on the matter; Raj (Kunal Nayyar), feeling left out as he's the only one of the group not in a relationship, asks his father to arrange a marriage; Howard (Simon Helberg) and Bernadette (Melissa Rauch), seemingly the only ones who have already figured out their lives, try to be there for their friends in their times of need.
Episode 1
The Conjugal Configuration
Mon, Sep 24, 2018 30 mins
In the Season 12 premiere, Sheldon and Amy's honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy's parents, Mr. and Mrs. Fowler. Also, Koothrappali insults physicist Neil deGrasse Tyson and starts a Twitter war.
Episode 2
The Wedding Gift Wormhole
Thu, Sep 27, 2018 30 mins
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.
Episode 3
The Procreation Calculation
Thu, Oct 4, 2018 30 mins
The Wolowitzes' life gets complicated when Stuart starts bringing his new girlfriend home. Penny and Leonard talk about starting a family. Raj explores an arranged marriage.
Episode 4
The Tam Turbulence
Thu, Oct 11, 2018 30 mins
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.
Episode 5
The Planetarium Collision
Thu, Oct 18, 2018 30 mins
Amy doesn't have time to work on super-asymmetry, so 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. Also, Koothrappali doesn't want Wolowitz to join him in hosting a show at the planetarium.
Episode 6
The Imitation Perturbation
Thu, Oct 25, 2018 30 mins
When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Also, Leonard is shocked that Penny doesn't remember their first kiss.
Episode 7
The Grant Allocation Derivation
Thu, Nov 1, 2018 30 mins
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.
Episode 8
The Consummation Deviation
Thu, Nov 8, 2018 30 mins
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.
Episode 9
The Citation Negation
Thu, Nov 15, 2018 30 mins
Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproven. Also, ultra-competitive Bernadette asks Stuart's girlfriend, Denise, to teach her how to beat Howard in a popular videogame.
Episode 10
The VCR Illumination
Thu, Dec 6, 2018 30 mins
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. Also, Bernadette turns into a pageant mom when she tries to help Wolowitz ace his Magic Castle audition.
Episode 11
The Paintball Scattering
Thu, Jan 3, 2019 30 mins
Penny and Leonard organize a paintball game that results in mayhem when Sheldon is jealous of Amy. Also, Koothrappali catches Anu with her ex-boyfriend, and Stuart doesn't want to move in with Denise.
Episode 12
The Propagation Proposition
Thu, Jan 10, 2019 30 mins
Penny's ex-boyfriend, Zack, and his wife want a baby, but when Zack is infertile, they ask Leonard for help. Also, Koothrappali attempts to mend things with his ex-fiancée, Anu.
Episode 13
The Confirmation Polarization
Thu, Jan 17, 2019 30 mins
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; Bernadette has a big success at work.
Episode 14
The Meteorite Manifestation
Thu, Jan 31, 2019 30 mins
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.
Episode 15
The Donation Oscillation
Thu, Feb 7, 2019 30 mins
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 aboard the "vomit comet."
Episode 16
The D & D Vortex
Thu, Feb 21, 2019 30 mins
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.
Episode 17
The Conference Valuation
Thu, Mar 7, 2019 30 mins
Penny and Bernadette go to San Diego for a pharmaceutical sales convention, leaving Wolowitz in charge of the kids. Also, Sheldon finds a book on experimenting on kids, and the guys plus Amy make a day of it.
Episode 18
The Laureate Accumulation
Thu, Apr 4, 2019 30 mins
Competitors Pemberton and Campbell charm America on a publicity tour, so 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 leads to opportunity and conflict for Howard, Bernadette and Stuart.
Episode 19
The Inspiration Deprivation
Thu, Apr 18, 2019 30 mins
Amy has a meltdown due to the pressure associated with winning a Nobel Prize. Also, Koothrappali and Wolowitz try to relive the good old days after Wolowitz buys a scooter that looks like the one he had years ago.
Episode 20
The Decision Reverberation
Thu, Apr 25, 2019 30 mins
Koothrappali 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.
Episode 21
The Plagiarism Schism
Thu, May 2, 2019 30 mins
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. Also, Wolowitz 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.
Episode 22
The Maternal Conclusion
Thu, May 9, 2019 20 mins
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.
Episode 23
The Change Constant
Thu, May 16, 2019 30 mins
Amy and Sheldon wait for the news. Wolowitz and Bernadette leave their kids. Leonard and Penny keep a secret.
Episode 24
The Stockholm Syndrome
Thu, May 16, 2019 30 mins
In the series finale, Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koothrappali makes a new friend, as the gang travels together into an uncharted future.
