TV series
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.
Streaming, rental and purchase options
Checked Sep 2, 2026
The Big Bang Theory is available to stream on DirecTV On Demand, HBO (Via Hulu), HBO Max, HBO 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.
Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
Choose an episode, then use the watch options above for the show.
Episode 1
In the eleventh season opener, Amy gives Sheldon an answer to his proposal while Howard and Bernadette struggle with some unexpected news.
Directed by Mark CendrowskiWritten by Chuck Lorre, Steve Holland, Tara Hernandez, Eric Kaplan, Jeremy Howe, Maria FerrariGuest stars Kevin Sussman, Laurie Metcalf, Susan Chuang, Riki Lindhome, George Wyner, Stephen Hawking
Episode 2
Leonard angers the university – and the entire physics community – after he gives an embarrassing interview. Also, Amy and Bernadette bond over having to hide their success from Sheldon and Howard.
Directed by Mark CendrowskiWritten by Steven Molaro, Maria Ferrari, Steve Holland, David Goetsch, Eric Kaplan, Anthony Del BroccoloGuest stars Ira Flatow, Regina King
Episode 3
Sheldon and Amy struggle with picking a wedding date, which stresses out Sheldon and causes him talking in his sleep. Meanwhile, Raj and Stuart fight over the attention of one of Bernadette's co-workers.
Directed by Mark CendrowskiWritten by Chuck Lorre, Tara Hernandez, Adam Faberman, Steve Holland, Maria Ferrari, Andy GordonGuest stars Kevin Sussman, Swati Kapila
Episode 4
As Howard worries about fatherhood, he and Sheldon bond when they jointly assemble a model rocket. Meanwhile, Penny bonds with Leonard's mother, Beverly, much to his concern.
Directed by Mark CendrowskiWritten by Tara Hernandez, Maria Ferrari, Bill Prady, Eric Kaplan, Steven Molaro, Jeremy HoweGuest stars Dana L. Wilson, Michael Patrick McGill, Christine Baranski
Episode 5
Sheldon and Raj confide in Bernadette when they can't handle Amy and Howard working together on a science project. Also, Penny and Leonard learn new tactics for how to deal with Sheldon from an unlikely source.
Directed by Nikki LorreWritten by Steven Molaro, Eric Kaplan, Steve Holland, David Goetsch, Maria Ferrari, Jeremy HoweGuest stars Efrain Gomez
Episode 6
Sheldon goes head-to-head with Wil Wheaton for the role of the new Professor Proton. Also, Penny steps in to take care of Halley when Bernadette and Howard both wind up on bed rest.
Directed by Mark CendrowskiWritten by Steven Molaro, Steve Holland, David Goetsch, Jeremy Howe, Andy Gordon, Alex YonksGuest stars Wil Wheaton, Pamela Adlon, Bob Newhart, Cat Hammons, Joey Rich
Episode 7
Sheldon and Bert collaborate on a research project, despite Sheldon’s embarrassment. Also, Penny and Bernadette coach Raj on how to navigate his relationship with Ruchi.
Directed by Mark CendrowskiWritten by Tara Hernandez, Adam Faberman, Anthony Del Broccolo, Steve Holland, Eric Kaplan, Maria FerrariGuest stars Kevin Sussman, Swati Kapila, Elka Rodriguez, Brian Posehn
Episode 8
Leonard and Howard are furious after they learn Sheldon went to work with the military behind their backs. Also, while Bernadette is on bed rest, she asks Raj to do some digging when she suspects that Ruchi might be trying to take over her projects at work.
Directed by Anthony RichWritten by Chuck Lorre, Tara Hernandez, Steve Holland, Eric Kaplan, Maria Ferrari, Jeremy HoweGuest stars John Ross Bowie, Dean Norris, Swati Kapila
Episode 9
Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable Bitcoin investment. Also, a seven-year-old video reveals a secret about Leonard and Penny's relationship.
Directed by Mark CendrowskiWritten by Steve Holland, David Goetsch, Jeremy Howe, Maria Ferrari, Anthony Del Broccolo, Andy GordonGuest stars Kevin Sussman, Carol Ann Susi, Eric Normington, Brian Thomas Smith
Episode 10
Sheldon and Amy try to eliminate stress from wedding planning by applying math to the process. Also, Raj “breaks up” with Howard after realizing his best friend is actually hurting his confidence.
Directed by Mark CendrowskiWritten by Steve Holland, Tara Hernandez, Maria Ferrari, Adam Faberman, Bill Prady, Eric KaplanGuest stars Kevin Sussman, Brian George, Marissa Cuevas, Brooke Baumer, Nicole J. Butler
Episode 11
Raj and Howard's feud continues as the gang plan Halley's first birthday party. Sheldon's surprise for Amy's birthday goes awry when they get food poisoning. Also, Leonard gets a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments.
Directed by Mark CendrowskiWritten by Eric Kaplan, Steve Holland, David Goetsch, Maria Ferrari, Jeremy Howe, Alex AyersGuest stars Kevin Sussman
Episode 12
Sheldon and Amy try to pick their Best-Man and Maid of Honor by experimenting on the gang.
Directed by Mark CendrowskiWritten by Tara Hernandez, Steve Holland, Maria Ferrari, Eric Kaplan, Jeremy Howe, Andy GordonGuest stars Kevin Sussman
Episode 13
When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Also, Bert the geologist replaces Wolowitz in the band Footprints on the Moon, and Sheldon finds Penny a surprising source of scientific inspiration.
Directed by Mark CendrowskiWritten by Chuck Lorre, Anthony Del Broccolo, Steve Holland, Eric Kaplan, Maria Ferrari, Jeremy HoweGuest stars Laurie Metcalf, Pamela Adlon, Jeffrey Cade Ross Brown, Brian Posehn
Episode 14
Raj finds himself in the middle of domestic drama when he learns the woman he's dating, has a very upset husband. Also, when Sheldon rents his old room back for a quiet place to work, he drives Leonard crazy by being a model tenant.
Directed by Mark CendrowskiWritten by Chuck Lorre, Steve Holland, Tara Hernandez, Maria Ferrari, Eric Kaplan, Steven MolaroGuest stars Beth Behrs, Walton Goggins
Episode 15
Leonard's book raises questions, and Amy guest stars on the new Professor Proton show.
Directed by Mark CendrowskiWritten by Adam Faberman, Steve Holland, Eric Kaplan, Maria Ferrari, Jeremy Howe, Andy GordonGuest stars Kevin Sussman, Wil Wheaton, Christine Baranski
Episode 16
When Bernadette won't go into labor, the gang tries different tactics to get things started. Also, Howard confronts Bernadette after Amy accidentally reveals she's already chosen their son's name.
Directed by Gay LinvillWritten by Steve Holland, Tara Hernandez, Maria Ferrari, Eric Kaplan, Anthony Del Broccolo, Adam Faberman
Episode 17
Leonard jumps through hoops to help secure the perfect wedding venue for Sheldon and Amy. Also, Bernadette and Howard have a hard time deciding who should stay at home with the kids and who should go back to work.
Directed by Mark CendrowskiWritten by Steven Molaro, Tara Hernandez, Steve Holland, David Goetsch, Eric Kaplan, Maria FerrariGuest stars John Ross Bowie, Caleb Pierce, Rachna Khatau
Episode 18
Bill Gates visits Penny's work, and the gang schemes to meet him. Hilarity ensues. Meanwhile, Sheldon is convinced that he's a target of an April's Fools prank.
Directed by Mark CendrowskiWritten by Steve Holland, Tara Hernandez, Maria Ferrari, Eric Kaplan, Jeremy Howe, Andy GordonGuest stars Kevin Sussman, Bill Gates, Laura Cerón, Eileen Galindo
Episode 19
When Leonard learns Sheldon is the president of the tenants association, he decides to run against him. Also, Bernadette encourages Howard and Raj to find the owner of a drone after they find it in the backyard.
Directed by Mark CendrowskiWritten by Steve Holland, David Goetsch, Eric Kaplan, Jeremy Howe, Maria Ferrari, Trevor AlperGuest stars Kevin Sussman, Michelle Arthur, Parvesh Cheena, Bob Stephenson, Megan McGown
Episode 20
A brilliant but reclusive scientist, Doctor Wolcott, invites Sheldon to his cabin in the middle of nowhere, and Leonard, Raj and Howard go along for the trip. Also, Penny and Bernadette improvise after Amy doesn’t like the tame bachelorette party they planned for her.
Directed by Mark CendrowskiWritten by Tara Hernandez, Steve Holland, Maria Ferrari, Anthony Del Broccolo, Eric Kaplan, Adam FabermanGuest stars Peter MacNicol, James Maslow, Edward James Gage, Ed Lieberman
Episode 21
Sheldon’s comic book store experience changes when writer Neil Gaiman puts Stuart’s store on the map. Also, friendships are threatened when Raj takes credit for Penny's astronomical discovery.
Directed by Mark CendrowskiWritten by Tara Hernandez, Eric Kaplan, Bill Prady, Steve Holland, Maria Ferrari, Andy GordonGuest stars Kevin Sussman, Neil Gaiman, Patrick Daniel, Lauren Lapkus
Episode 22
Sheldon goes to Vegas to win money for science. Also, Penny and Bernadette take Amy wedding dress shopping, but her terrible choice entangles them in a web of lies.
Directed by Nikki LorreWritten by Tara Hernandez, Steve Holland, Maria Ferrari, David Goetsch, Eric Kaplan, Jeremy HoweGuest stars Kevin Sussman, Joshua Malina, Mark Berry, Evan Charest, D'Kia Anderson, Seth Coltan
Episode 23
When Sheldon learns that his mother won’t attend his wedding unless he invites his brother, Georgie, he and Leonard travel to Texas to end a family feud. Also, the Wolowitz kids inadvertently infest Amy, Bernadette, Howard and Raj with pinkeye.
Directed by Mark CendrowskiWritten by Eric Kaplan, Anthony Del Broccolo, Steve Holland, David Goetsch, Maria Ferrari, Jeremy HoweGuest stars Jerry O'Connell, Ellie Reed, Lynn Andrews
Episode 24
When Amy's parents and Sheldon's family arrive, everybody is focused to make sure all wedding arrangements go according to plan – everyone except the bride and groom.
Directed by Mark CendrowskiWritten by Chuck Lorre, Steven Molaro, Steve Holland, Tara Hernandez, Maria Ferrari, Eric KaplanGuest stars Kevin Sussman, Laurie Metcalf, John Ross Bowie, Mark Hamill, Courtney Henggeler, Jerry O'Connell, Kathy Bates, Teller
Episode information updated Sep 16, 2026
Johnny GaleckiLeonard Hofstadter
Jim ParsonsSheldon Cooper
Kaley CuocoPenny
Simon HelbergHoward Wolowitz
Kunal NayyarRajesh Koothrappali
Melissa RauchBernadette Rostenkowski
Mayim BialikAmy Farrah Fowler
Kevin SussmanStuart Bloom
CBSUnited States
Chuck Lorre ProductionsUnited States
Warner Bros. TelevisionUnited States
