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.
#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.
#2 - The Change Constant
Season 12 - Episode 23 - Aired 5/16/2019
Sheldon and Amy await big news.
#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.
#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.
#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.
#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.
#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.
#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.
#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."
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.
#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.