The Big Bang Theory: Season 12

The Big Bang Theory: Season 12

Poster for The Big Bang Theory: Season 12

The sitcom is centered on five characters living in Pasadena, California: roommates Leonard Hofstadter and Sheldon Cooper; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's equally geeky and socially awkward friends and co-workers, mechanical engineer Howard Wolowitz and astrophysicist Raj Koothrappali. The geekiness and intellect of the four guys is contrasted for comic effect with Penny's social skills and common sense.

2018Rating: TV-14United States of AmericaChuck Lorre Productions, Warner Bros. Television

Streaming (2 Providers)



The Decision Reverberation

Koothrappali is worried people won’t take him seriously in his... More 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.


The Citation Negation

Sheldon and Amy are devastated after learning from a Russian... More 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.


The Consummation Deviation

Sheldon tries to bond with Amy's father, but when Howard... More 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.


The Grant Allocation Derivation

Leonard is caught between a rock and a hard place... More when he's responsible for distributing extra grant money. Bernadette turns the backyard playhouse into a hideaway from Howard and the kids.


The Imitation Perturbation

When Howard dresses up as Sheldon for Halloween, Sheldon seeks... More retaliation at Leonard and Penny's Halloween party. Leonard is shocked that Penny doesn't remember their first kiss.


The Planetarium Collision

When Amy doesn’t have time to work on super-asymmetry, Sheldon... More 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.


The Tam Turbulence

When Sheldon won't tell anyone why he's never mentioned his... More 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.


The Procreation Calculation

The Wolowitzes' life gets complicated when Stuart starts bringing his... More new girlfriend home. Penny and Leonard talk about starting a family. Raj explores an arranged marriage.


Unraveling the Mystery: A Big Bang Farewell

Johnny Galecki and Kaley Cuoco will lead fans on a... More trip down memory lane, sharing some of the best-kept backstage secrets and personal memories from the past 12 years.


The Change Constant / The Stockholm Syndrome

Sheldon and Amy await big news.


The Maternal Conclusion

Leonard is pleasantly surprised when Beverly comes to visit and... More 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.


The Plagiarism Schism

Kripke has proof that Dr. Pemberton plagiarized his thesis in... More 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.


The Conjugal Configuration

Sheldon and Amy's honeymoon runs aground in New York. Penny... More and Leonard discover they are uncomfortably similar to Amy's parents. Raj insults physicist Neil deGrasse Tyson and starts a Twitter war.


The Wedding Gift Wormhole

Sheldon and Amy drive themselves crazy trying to figure out... More 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.


The Inspiration Deprivation

The concept of what it would mean for women everywhere... More 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.


The Laureate Accumulation

When competitors Pemberton and Campbell charm America on a publicity... More 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.


The Conference Valuation

When Penny and Bernadette go to San Diego for a... More 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.


The D & D Vortex

The gang finds out Wil Wheaton hosts a celebrity Dungeons... More 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.


The Donation Oscillation

Penny tries to seduce an abstaining Leonard to ruin his... More "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.


The Meteorite Manifestation

Sheldon is thrilled to help Bernadette and Wolowitz navigate bureaucratic... More paperwork, until he discovers they are breaking the law. Also, Leonard is disappointed when his friends exclude him from a scientific project.


The Confirmation Polarization

Sheldon and Amy are thrilled when their super asymmetry theory... More is proven by two physicists, until they try to kick Amy off the Nobel nomination; Bernadette has a big success at work.


The Propagation Proposition

Penny’s ex-boyfriend, Zack, and his wife want a baby, but... More when Zack is infertile, they ask Leonard for help. Also, Koothrappali attempts to mend things with his ex-fiancée, Anu.


The Paintball Scattering

Penny and Leonard organize a paintball game that results in... More 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.


The VCR Illumination

Sheldon and Amy are still down about their theory being... More 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.

The Big Bang Theory: Season 12 | Release Details

The Big Bang Theory: Season 12 is available to stream in New Zealand now on Netflix and Prime Video.