7.9/104,033 votes#1 - The Conjugal Configuration
Season 12 Episode 1 - Aired 9/24/2018
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.
Director: Mark Cendrowski
Writer: N/A
7.6/102,829 votes#2 - 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. Raj decides he wants to settle down and asks his father to arrange a marriage for him.
Director: Mark Cendrowski
Writer: N/A
7.2/102,706 votes#3 - 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 Raj explores an arranged marriage.
Director: Mark Cendrowski
Writer: N/A
7.0/102,617 votes#4 - The Tam Turbulence
Season 12 Episode 4 - Aired 10/11/2018
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.
Director: Mark Cendrowski
Writer: N/A
6.8/102,615 votes#5 - 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. Raj doesn’t want Howard to join him in hosting a show at the planetarium.
Director: Mark Cendrowski
Writer: N/A
8.2/103,188 votes#6 - The Imitation Perturbation
Season 12 Episode 6 - Aired 10/25/2018
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.
Director: Mark Cendrowski
Writer: N/A
7.3/102,580 votes#7 - 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. Bernadette turns the backyard playhouse into a hideaway from Howard and the kids.
Director: Mark Cendrowski
Writer: N/A
7.3/102,639 votes#8 - The Consummation Deviation
Season 12 Episode 8 - Aired 11/8/2018
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.
Director: Mark Cendrowski
Writer: N/A
7.2/102,602 votes#9 - 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 theorized and disproven. Meanwhile, ultra-competitive Bernadette asks Stuart’s girlfriend to teach her how to beat Howard in a popular video game.
Director: Kristy Cecil
Writer: N/A
7.4/102,694 votes#10 - 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. Bernadette turns into a pageant mom when she tries to help Howard ace his Magic Castle audition.
Director: Mark Cendrowski
Writer: N/A
7.3/102,563 votes#11 - 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, Raj catches Anu with her ex-boyfriend, and Stuart gets cold feet when Denise hints at the possibility of them living together.
Director: Mark Cendrowski
Writer: N/A
7.1/102,500 votes#12 - The Propagation Proposition
Season 12 Episode 12 - Aired 1/10/2019
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.
Director: Mark Cendrowski
Writer: N/A
7.1/102,521 votes#13 - The Confirmation Polarization
Season 12 Episode 13 - Aired 1/17/2019
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.
Director: Mark Cendrowski
Writer: N/A
7.1/102,510 votes#14 - 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.
Director: Mark Cendrowski
Writer: N/A
7.4/102,588 votes#15 - 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.
Director: Mark Cendrowski
Writer: N/A
7.9/102,852 votes#16 - 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.
Director: Mark Cendrowski
Writer: N/A
7.1/102,498 votes#17 - 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.
Director: Mark Cendrowski
Writer: N/A
7.1/102,472 votes#18 - 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 causes opportunity and conflict at the Wolowitz home.
Director: Mark Cendrowski
Writer: N/A
7.0/102,507 votes#19 - 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, Howard and Raj try to relive the good old days after Howard buys a scooter that looks like the one he had years ago.
Director: Mark Cendrowski
Writer: N/A
7.1/102,467 votes#20 - The Decision Reverberation
Season 12 Episode 20 - Aired 4/25/2019
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.
Director: Mark Cendrowski
Writer: N/A
7.2/102,536 votes#21 - 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. Meanwhile, Howard learns that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him.
Director: Nikki Lorre
Writer: N/A
7.9/103,072 votes#22 - 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.
Director: Kristy Cecil
Writer: N/A
9.0/105,289 votes#23 - The Change Constant / The Stockholm Syndrome
Season 12 Episode 23 - Aired 5/16/2019
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.
Director: Mark Cendrowski
Writer: N/A
9.5/1011,028 votes#24 - Unraveling the Mystery: A Big Bang Farewell
Season 12 Episode 24 - Aired 5/16/2019
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.
Director: N/A
Writer: N/A
The Best Episodes of The Big Bang Theory Season 12
Every episode of The Big Bang Theory Season 12 ranked from best to worst. Discover the Best Episodes of The Big Bang Theory Season 12!
Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
Genre:Comedy
Network:CBS
Season 12 Ratings Summary
"The Conjugal Configuration" is the best rated episode of "The Big Bang Theory" season 12. It scored 7.9/10 based on 4033 votes. Directed by Mark Cendrowski and written by N/A, it aired on 9/24/2018. This episode is rated 0.3 points higher than the second-best, "The Wedding Gift Wormhole".