The Big Bang Theory poster

TV series

The Big Bang Theory

2007TV-PG12 seasons7.9 / 10

Smart is the new sexy.

Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.

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Checked Jul 22, 2026

The Big Bang Theory is available to stream on DirecTV On Demand, HBO (Via Hulu), HBO Max, Max (Via Amazon Prime), and YouTube TV in United States. You can also rent or buy it from Google Play, Amazon, Apple TV, and Fandango at Home. Use the direct links below to open the provider.

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Synopsis

Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.

Season 12 episodes

Choose an episode, then use the watch options above for the show.

Episode 1

The Conjugal Configuration

Sep 24, 201820m9.9 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Chuck Lorre, Tara Hernandez, Steve Holland, Eric Kaplan, Maria Ferrari, Jeremy HoweGuest stars Bill Nye, Neil deGrasse Tyson, Giovanni Bejarano, Ciara Renée, Andy Taylor Kim, Kathy Bates, Teller, Jeanelle Marie Cruz

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Episode 2

The Wedding Gift Wormhole

Sep 27, 201821m7.3 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steven Molaro, Maria Ferrari, Steve Holland, David Goetsch, Eric Kaplan, Andy GordonGuest stars Kevin Sussman, Brian George, Luis Aldana, Kikey Castillo, Lauren Lapkus, Brian Posehn

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Episode 3

The Procreation Calculation

Oct 4, 201820m6.9 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Chuck Lorre, Tara Hernandez, Steve Holland, Adam Faberman, Maria Ferrari, Anthony Del BroccoloGuest stars Kevin Sussman, Matt Knudsen, Keith Carradine, Lauren Lapkus, Rati Gupta

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Episode 4

The Tam Turbulence

Oct 11, 201819m6.8 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steven Molaro, Maria Ferrari, Steve Holland, David Goetsch, Eric Kaplan, Jeremy HoweGuest stars Robert Wu, Jerry O'Connell, Rati Gupta

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Episode 5

The Planetarium Collision

Oct 18, 201819m6.7 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steve Holland, Tara Hernandez, Eric Kaplan, Maria Ferrari, Alex Ayers, Andy GordonGuest stars Eddie Shin, Alison Martin, Hermie Castillo, Joshua Malina, Bob Newhart

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Episode 6

The Imitation Perturbation

Oct 25, 201820m7.3 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Tara Hernandez, Maria Ferrari, Steve Holland, Eric Kaplan, Adam Faberman, Jeremy HoweGuest stars Kevin Sussman, Pamela Adlon, David Theune, Rati Gupta, Brian Posehn

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Episode 7

The Grant Allocation Derivation

Nov 1, 201820m6.9 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steve Holland, Eric Kaplan, Anthony Del Broccolo, David Goetsch, Maria Ferrari, Alex YonksGuest stars John Ross Bowie, Maribeth Monroe, Joshua Malina

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Episode 8

The Consummation Deviation

Nov 8, 201822m7.0 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Maria Ferrari, Steve Holland, Eric Kaplan, Adam Faberman, Andy GordonGuest stars Kevin Sussman, Kathy Bates, Teller, Rati Gupta

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Episode 9

The Citation Negation

Nov 15, 201821m7.0 / 10

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.

Episode credits

Directed by Kristy CecilWritten by Tara Hernandez, Steve Holland, Eric Kaplan, David Goetsch, Jeremy Howe, Maria FerrariGuest stars Lauren Lapkus

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Episode 10

The VCR Illumination

Dec 6, 201821m7.0 / 10mid season

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.

Episode credits

Directed by Mark CendrowskiWritten by Steven Molaro, Bill Prady, Steve Holland, Maria Ferrari, Jeremy Howe, Andy GordonGuest stars Iain Armitage, Lance Barber, Montana Jordan, Kurt Scholler, Christine Baranski

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Episode 11

The Paintball Scattering

Jan 3, 201920m6.9 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Tara Hernandez, Steve Holland, Maria Ferrari, Adam Faberman, Eric Kaplan, Anthony Del BroccoloGuest stars Kevin Sussman, Hira Ambrosino, Hugh Kennedy, Lauren Lapkus, Joshua Malina, Rati Gupta

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Episode 12

The Propagation Proposition

Jan 10, 201920m6.7 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steve Holland, David Goetsch, Eric Kaplan, Jeremy Howe, Maria FerrariGuest stars Brian George, Brian Thomas Smith, Rati Gupta, Shay Ali, Chip Chinery, Lindsey Kraft

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Episode 13

The Confirmation Polarization

Jan 17, 201921m6.7 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steve Holland, Tara Hernandez, Eric Kaplan, Anthony Del Broccolo, Maria Ferrari, Andy GordonGuest stars Keili Lefkovitz, Chasty Ballesteros, Kal Penn, Sean Astin, Joshua Malina, Caleb Pierce

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Episode 14

The Meteorite Manifestation

Jan 31, 201920m6.6 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Tara Hernandez, Maria Ferrari, Steve Holland, Eric Kaplan, Jeremy HoweGuest stars Kevin Sussman, Andy Daly, Joel McCrary, Lauren Lapkus, Minerva García, Hilda Boulware, Brian Posehn

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Episode 15

The Donation Oscillation

Feb 7, 201922m6.7 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steve Holland, Adam Faberman, Bill Prady, David Goetsch, Jeremy Howe, Maria FerrariGuest stars Keith Carradine, Eric Nenninger, Brian Thomas Smith, Rati Gupta, Lindsey Kraft

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Episode 16

The D & D Vortex

Feb 21, 201921m7.2 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Tara Hernandez, Maria Ferrari, Anthony Del Broccolo, Steve Holland, Eric Kaplan, Andy GordonGuest stars Kevin Sussman, Wil Wheaton, Joe Manganiello, Kareem Abdul-Jabbar, William Shatner, Kevin Smith

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Episode 17

The Conference Valuation

Mar 7, 201920m6.6 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steven Molaro, Steve Holland, Eric Kaplan, Maria Ferrari, Jeremy HoweGuest stars Kevin Sussman, Jason Kravits, Chasty Ballesteros, Ben Rauch, Pamela Adlon, Andre Boyer, Christine Baranski

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Episode 18

The Laureate Accumulation

Apr 4, 201922m6.8 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Adam Faberman, Steve Holland, David Saltzberg, David Goetsch, Eric Kaplan, Maria FerrariGuest stars Kevin Sussman, Pamela Adlon, Kal Penn, Sean Astin, Joshua Malina, Ellen DeGeneres, George F. Smoot, Frances H. Arnold

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Episode 19

The Inspiration Deprivation

Apr 18, 201921m6.5 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steve Holland, Tara Hernandez, Maria Ferrari, Eric Kaplan, Anthony Del Broccolo, Andy GordonGuest stars Brooke Dillman, Regina King, Doreen Calderon, Sarah Eagen, Claudia Choi, Tiffany Commons, Krishna Smitha, Joshua Malina

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Episode 20

The Decision Reverberation

Apr 25, 201920m6.6 / 10

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.

Episode credits

Directed by Mark CendrowskiWritten by Steven Molaro, Tara Hernandez, Steve Holland, Eric Kaplan, Maria Ferrari, Jeremy HoweGuest stars David Theune, Angela Lin, Elijah Isaiah Cook, Joshua Malina, Rati Gupta

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Episode 21

The Plagiarism Schism

May 2, 201920m6.9 / 10

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.

Episode credits

Directed by Nikki LorreWritten by Steve Holland, Tara Hernandez, Maria Ferrari, Eric Kaplan, Adam Faberman, David GoetschGuest stars John Ross Bowie, Kal Penn, Sean Astin, Joshua Malina

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Episode 22

The Maternal Conclusion

May 9, 201921m7.3 / 10

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.

Episode credits

Directed by Kristy CecilWritten by Eric Kaplan, Steve Holland, Jeremy Howe, Maria Ferrari, Anthony Del Broccolo, Andy GordonGuest stars Kevin Sussman, Todd Giebenhain, Lauren Lapkus, Rati Gupta, Christine Baranski

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Episode 23

The Change Constant / The Stockholm Syndrome

May 16, 201942m8.0 / 10finale

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.

Episode credits

Directed by Mark CendrowskiWritten by Eric Kaplan, Chuck Lorre, Bill Prady, Steven Molaro, David Goetsch, Steve Holland, Maria Ferrari, Andy Gordon, Anthony Del Broccolo, Tara Hernandez, Jeremy Howe, Adam FabermanGuest stars Kevin Sussman, John Ross Bowie, Blair Hickey, Dinora Walcott, Rodney J. Hobbs, Sarah Michelle Gellar, Joshua Malina, Brian Posehn

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Episode 24

Unraveling the Mystery: A Big Bang Farewell

May 16, 201924m8.1 / 10finale

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.

Episode credits

Written by Chuck Lorre

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Episode information updated Jul 23, 2026

More about The Big Bang Theory

Watch trailerThe Big Bang Theory Trailer

Cast

Johnny GaleckiLeonard Hofstadter

Jim ParsonsSheldon Cooper

Kaley CuocoPenny

Simon HelbergHoward Wolowitz

Kunal NayyarRajesh Koothrappali

Melissa RauchBernadette Rostenkowski

Mayim BialikAmy Farrah Fowler

Kevin SussmanStuart Bloom

Credits

Created by: Chuck Lorre, Bill Prady
Written by: Lee Aronsohn, Jim Reynolds, Chuck Lorre, Steven Molaro, Bill Prady, Eric Kaplan, Steve Holland, David Goetsch, Tara Hernandez, Andy Gordon, Maria Ferrari, Richard A. Rosenstock, Jeremy Howe, Anthony Del Broccolo, Adam Faberman, Steven Molaro

Production details

Status: Ended
Series type: Scripted
Episodes: 279
Original language: English

Networks & production

CBSUnited States
Chuck Lorre ProductionsUnited States
Warner Bros. TelevisionUnited States

Themes

friendsgeeknerdscientistsitcom

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