The BEST episodes of The Big Bang Theory season 12

Every episode of The Big Bang Theory season 12, ranked from best to worst by thousands of votes from fans of the show. The best episodes of The Big Bang Theory season 12!

A woman who moves into an apartment across the hall from two brilliant but socially awkward physicists shows them how little they know about life outside of the laboratory.

Last Updated: 6/20/2024Network: CBSStatus: Ended
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The Stockholm Syndrome
star
8.57
3256 votes

#1 - The Stockholm Syndrome

Season 12 - Episode 24 - Aired 5/16/2019

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.

Directors: Mark Cendrowski
Watch Now:AmazonApple TV
The Change Constant
star
8.38
4017 votes

#2 - The Change Constant

Season 12 - Episode 23 - Aired 5/16/2019

Sheldon and Amy await big news.

Directors: Mark Cendrowski
Watch Now:AmazonApple TV
The Imitation Perturbation
star
7.83
4481 votes

#3 - The Imitation Perturbation

Season 12 - Episode 6 - Aired 10/25/2018

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.

Directors: Mark Cendrowski
Watch Now:AmazonApple TV
The Wedding Gift Wormhole
star
7.70
4569 votes

#4 - The Wedding Gift Wormhole

Season 12 - Episode 2 - Aired 9/27/2018

Sheldon and Amy drive themselves crazy trying to figure out what “perfect gift” Leonard and Penny gave them for their wedding. Also, Koothrappali decides he wants to settle down and asks his father to arrange a marriage for him.

Directors: Mark Cendrowski
Watch Now:Apple TV
The D & D Vortex
star
7.69
3864 votes

#5 - The D & D Vortex

Season 12 - Episode 16 - Aired 2/21/2019

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The VCR Illumination
star
7.69
4126 votes

#6 - The VCR Illumination

Season 12 - Episode 10 - Aired 12/6/2018

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Maternal Conclusion
star
7.66
3681 votes

#7 - The Maternal Conclusion

Season 12 - Episode 22 - Aired 5/9/2019

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.

Directors: Kristy Cecil
Watch Now:Apple TV
The Consummation Deviation
star
7.65
4175 votes

#8 - The Consummation Deviation

Season 12 - Episode 8 - Aired 11/8/2018

Sheldon tries to bond with Amy’s father, but when Wolowitz lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler. Also, Koothrappali and Anu try to get physical for the first time.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Donation Oscillation
star
7.63
3903 votes

#9 - The Donation Oscillation

Season 12 - Episode 15 - Aired 2/7/2019

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."

Directors: Mark Cendrowski
Watch Now:Apple TV
The Paintball Scattering
star
7.61
4142 votes

#10 - The Paintball Scattering

Season 12 - Episode 11 - Aired 1/3/2019

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Grant Allocation Derivation
star
7.58
4207 votes

#11 - The Grant Allocation Derivation

Season 12 - Episode 7 - Aired 11/1/2018

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Conjugal Configuration
star
7.57
4821 votes

#12 - The Conjugal Configuration

Season 12 - Episode 1 - Aired 9/24/2018

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Plagiarism Schism
star
7.56
3784 votes

#13 - The Plagiarism Schism

Season 12 - Episode 21 - Aired 5/2/2019

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.

Directors: Nikki Lorre
Watch Now:Apple TV
The Procreation Calculation
star
7.56
4354 votes

#14 - The Procreation Calculation

Season 12 - Episode 3 - Aired 10/4/2018

The Wolowitzes’ life gets complicated when Stuart starts bringing his new girlfriend home. Also, Penny and Leonard talk about starting a family while Koothrappali explores an arranged marriage.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Citation Negation
star
7.55
4157 votes

#15 - The Citation Negation

Season 12 - Episode 9 - Aired 11/15/2018

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.

Directors: Kristy Cecil
Watch Now:Apple TV
The Propagation Proposition
star
7.55
4036 votes

#16 - The Propagation Proposition

Season 12 - Episode 12 - Aired 1/10/2019

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Confirmation Polarization
star
7.54
4042 votes

#17 - The Confirmation Polarization

Season 12 - Episode 13 - Aired 1/17/2019

Sheldon and Amy's super asymmetry theory is proven by two physicists, Dr. Pemberton and Dr. Campbell from Chicago, who then try to kick Amy off the Nobel nomination. Also, Bernadette has a big success at work and Penny's going to be a part of it—whether she wants to be or not.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Conference Valuation
star
7.53
3868 votes

#18 - The Conference Valuation

Season 12 - Episode 17 - Aired 3/7/2019

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Laureate Accumulation
star
7.51
3848 votes

#19 - The Laureate Accumulation

Season 12 - Episode 18 - Aired 4/4/2019

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 leads to opportunity and conflict for Howard, Bernadette and Stuart.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Meteorite Manifestation
star
7.50
3957 votes

#20 - The Meteorite Manifestation

Season 12 - Episode 14 - Aired 1/31/2019

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Decision Reverberation
star
7.47
3768 votes

#21 - The Decision Reverberation

Season 12 - Episode 20 - Aired 4/25/2019

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.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Tam Turbulence
star
7.47
4365 votes

#22 - The Tam Turbulence

Season 12 - Episode 4 - Aired 10/11/2018

When Sheldon won’t tell anyone why he’s never mentioned Tam, his childhood best friend, Leonard takes matters into his own hands. Also, Bernadette and Penny take out Raj’s fiancée, Anu, for dinner to get the skinny on her.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Inspiration Deprivation
star
7.46
3764 votes

#23 - The Inspiration Deprivation

Season 12 - Episode 19 - Aired 4/18/2019

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, Koothrappali and Wolowitz try to relive the good old days after Wolowitz buys a scooter that looks like the one he had years ago.

Directors: Mark Cendrowski
Watch Now:Apple TV
The Planetarium Collision
star
7.45
4343 votes

#24 - The Planetarium Collision

Season 12 - Episode 5 - Aired 10/18/2018

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. Also, Koothrappali doesn’t want Wolowitz to join him in hosting a show at the planetarium.

Directors: Mark Cendrowski
Watch Now:Apple TV