The Big Bang Theory · Season 12 24 Episodes

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Best friends and brilliant physicists Leonard Hofstadter and Sheldon Cooper are geniuses in the lab but socially challenge outside of it. Despite this, Leonard married his beautiful, street-smart neighbour, Penny. And Sheldon, after a long courtship, wed successful neurobiologist Amy. And while aerospace engineer Howard and his adorable microbiologist wife, Bernadette, explore the predicament of being married with two kids, astrophysicist Raj considers a traditional arranged marriage. As the supersmart friends solve quotidian conundrums posed by academia. Family crises and video games, their experiments in domestic bliss never fail to produce hilarious results. But all good theories arrive at a conclusion. The twelfth and final season of "television's perpetual laughter continuum comprises" 24 supercharged episodes that take comedy to the next dimension...and beyond.

Episodes

NoFirst Air DateNameOverview
12x1The Conjugal ConfigurationSheldon 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.
12x2The Wedding Gift WormholeSheldon 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.
12x3The Procreation CalculationThe 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.
12x4The Tam TurbulenceWhen 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.
12x5The Planetarium CollisionWhen 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.
12x6The Imitation PerturbationWhen 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.
12x7The Grant Allocation DerivationLeonard 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.
12x8The Consummation DeviationSheldon 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.
12x9The Citation NegationSheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproven. Ultra-competitive Bernadette asks Stuart’s girlfriend to teach her how to beat Howard in a popular video game.
12x10The VCR IlluminationSheldon 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.
12x11The Paintball ScatteringPenny 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.
12x12The Propagation PropositionPenny’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.
12x13The Confirmation PolarizationSheldon 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.
12x14The Meteorite ManifestationSheldon 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.
12x15The Donation OscillationPenny 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.
12x16The D & D VortexThe 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.
12x17The Conference ValuationWhen 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.
12x18The Laureate AccumulationWhen 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.
12x19The Inspiration DeprivationThe 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.
12x20The Decision ReverberationKoothrappali 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.
12x21The Plagiarism SchismKripke 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; Wolowitz learns that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him.
12x22The Maternal ConclusionLeonard 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.
12x23The Change Constant / The Stockholm SyndromeSheldon and Amy await big news.
12x24Unraveling the Mystery: A Big Bang FarewellJohnny 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.

Cast

CharacterPerson
Leonard HofstadterJohnny Galecki
Sheldon CooperJim Parsons
PennyKaley Cuoco
Howard WolowitzSimon Helberg
Rajesh KoothrappaliKunal Nayyar
Bernadette RostenkowskiMelissa Rauch
Amy Farrah FowlerMayim Bialik

Crew

DepartmentJobPerson
ArtArt DirectionFrancoise Cherry-Cohen
Construction CoordinatorRick Puccio
Production DesignJohn Shaffner
Set DecorationAnn Shea
CameraCamera OperatorBrian W. Armstrong
Jamie Hitchcock
John DeChene
Richard Price
Director of PhotographySteven V. Silver
Key GripDavid Pearce
Costume & Make-UpCostume DesignMary T. Quigley
Hair Department HeadFaye Woods
Key Hair StylistSylvia Surdu
Key Makeup ArtistLinda Cowan
Makeup Department HeadVikki McCarter
CrewPost Production SupervisorAlexandra Barbone
Property MasterScott L. London
Scientific ConsultantDavid Saltzberg
DirectingScript SupervisorJulie Fleischer
EditingAssistant EditorTodd Morris
EditorPeter Chakos
LightingGafferJohn Greene
ProductionAssociate ProducerCharlie Back
CastingKen Miller
Nikki Valko
Tara Treacy
Co-Executive ProducerAndy Gordon
Anthony Del Broccolo
Jeremy Howe
Peter Chakos
Tara Hernandez
Co-ProducerJustin D. Hetzel
Mary T. Quigley
Ryan Berdan
Executive ProducerBill Prady
Chuck Lorre
David Goetsch
Eric Kaplan
Maria Ferrari
Steve Holland
Steven Molaro
ProducerKristy Cecil
Robinson Green
Production CoordinatorShannon Timberlake
Unit Production ManagerRobinson Green
SoundProduction Sound MixerBruce Peters
Sound Re-Recording MixerBob La Masney
Charlie McDaniel
Theme Song PerformanceBarenaked Ladies