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
After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their relationship.
Directed by Mark CendrowskiWritten by Chuck Lorre, Steve Holland, Maria Ferrari, Eric Kaplan, Jim Reynolds, Steven MolaroGuest stars Kevin Sussman, Laurie Metcalf, Jim Meskimen, Louise Claps
Episode 2
Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a special episode of "Fun with Flags" after his breakup with Amy, and Bernadette feels guilty about withholding a secret from Penny.
Directed by Mark CendrowskiWritten by Steven Molaro, Tara Hernandez, Jim Reynolds, Steve Holland, Chuck Lorre, Maria FerrariGuest stars Melissa Tang
Episode 3
The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family that she eloped with Leonard.
Directed by Mark CendrowskiWritten by Steve Holland, David Goetsch, Eric Kaplan, Jim Reynolds, Jeremy Howe, Steven MolaroGuest stars Keith Carradine
Episode 4
Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny. Also, Howard and Raj form a band to play at the Comic Book Store.
Directed by Mark CendrowskiWritten by Chuck Lorre, Tara Hernandez, Eric Kaplan, Steve Holland, Steven Molaro, Maria FerrariGuest stars Kevin Sussman, Laura Spencer, Craig Welzbacher, Kurt Koehler, Arshad Aslam
Episode 5
The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position when Kripke expresses interest in Amy. Also, when Stuart struggles to get female customers at the Comic Book Store, Penny, Amy and Bernadette come by to help him out.
Directed by Mark CendrowskiWritten by Chuck Lorre, Jim Reynolds, Maria Ferrari, Eric Kaplan, Steven Molaro, Saladin K. PattersonGuest stars Kevin Sussman, John Ross Bowie, Megan Heyn, Patrika Darbo, Rebecca Ann Johnson
Episode 6
In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Bernadette download a dating app on Amy's phone to try and find her a new man.
Directed by Mark CendrowskiWritten by Jim Reynolds, Maria Ferrari, Anthony Del Broccolo, Steve Holland, Eric Kaplan, Steven MolaroGuest stars Kevin Sussman, John Ross Bowie, Michael Rapaport, Elena Campbell-Martinez
Episode 7
Wil Wheaton interviews Sheldon for a Star Trek documentary where he reveals the ring and his plan to propose to Amy. Bernadette wants to start renovating the house and the topic of starting a family together with Howard is brought up.
Directed by Nikki LorreWritten by Chuck Lorre, Tara Hernandez, Steve Holland, Jim Reynolds, Steven Molaro, Jeremy HoweGuest stars Adam Nimoy, Casey Sander, Stephen Merchant, Wil Wheaton
Episode 8
Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy with details about a guy she is dating, Penny and Bernadette decide to spy on her.
Directed by Mark CendrowskiWritten by Steven Molaro, Steve Holland, Tara Hernandez, Eric Kaplan, Chuck Lorre, Jim ReynoldsGuest stars Stephen Merchant, Lio Tipton
Episode 9
Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought.
Directed by Mark CendrowskiWritten by Tara Hernandez, Steve Holland, Jim Reynolds, Jeremy Howe, Maria Ferrari, Adam FabermanGuest stars Laura Spencer, Elon Musk, Wayne Wilderson
Episode 10
Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date, and Wolowitz and Koothrappali become obsessed with a fan of their band, "Footprints on the Moon".
Directed by Mark CendrowskiWritten by Steve Holland, Eric Kaplan, Saladin K. Patterson, Jim Reynolds, Steven Molaro, Jeremy HoweGuest stars Yoshi Barrigas, Stephen Merchant
Episode 11
After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.
Directed by Mark CendrowskiWritten by Steven Molaro, Tara Hernandez, Jim Reynolds, Steve Holland, Eric Kaplan, Maria FerrariGuest stars Kevin Sussman, Jeff Witzke, Wil Wheaton, Bob Newhart
Episode 12
Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and Koothrappali collaborate on an astronomical discovery, and Wolowitz and Bernadette can't believe what they are feeling after Stuart moves out.
Directed by Mark CendrowskiWritten by Steve Holland, Saladin K. Patterson, Jim Reynolds, Steven Molaro, Maria Ferrari, Anthony Del BroccoloGuest stars Kevin Sussman, Jane Kaczmarek
Episode 13
After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.
Directed by Mark CendrowskiWritten by Chuck Lorre, Steve Holland, Eric Kaplan, David Goetsch, Steven Molaro, Saladin K. PattersonGuest stars Kevin Sussman, Laura Spencer
Episode 14
Meemaw meets Amy, but it isn't all roses. Meemaw seems to have an axe to grind with her. Sheldon comes to Amy's defense, but not before Meemaw lets a little secret of his slip.
Directed by Mark CendrowskiWritten by Chuck Lorre, Steve Holland, Tara Hernandez, Maria Ferrari, Jim Reynolds, Steven MolaroGuest stars June Squibb, Alessandra Torresani, Declan Churchill Carter
Episode 15
Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub and Raj is torn between Emily and the cute girl he met at the Comic Bookstore.
Directed by Mark CendrowskiWritten by Steven Molaro, Tara Hernandez, Steve Holland, Eric Kaplan, Jim Reynolds, Jeremy HoweGuest stars Laura Spencer, John Ross Bowie, Alessandra Torresani, Creagen Dow, Shane Blades
Episode 16
When the gang finds out about Bernadette’s pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, and Wolowitz is convinced he must make more money to provide for the baby.
Directed by Mark CendrowskiWritten by Steve Holland, Eric Kaplan, Saladin K. Patterson, Jim Reynolds, Steven Molaro, Maria Ferrari
Episode 17
After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.
Directed by Mark CendrowskiWritten by Chuck Lorre, Steve Holland, Tara Hernandez, Eric Kaplan, Jeremy Howe, Steven MolaroGuest stars Kevin Sussman, Sara Gilbert, John Ross Bowie, Adam West, Wil Wheaton, Stephen Hawking, Christine Baranski
Episode 18
Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and Bernadette give Koothrappali dating advice when Emily reaches out to him after their breakup.
Directed by Mark CendrowskiWritten by Steven Molaro, Jim Reynolds, Steve Holland, Eric Kaplan, Adam Faberman, Maria FerrariGuest stars Laura Spencer, Alessandra Torresani, Jim Holmes
Episode 19
Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and Wolowitz after they lie to their wives in order to attend an early screening of a movie.
Directed by Mark CendrowskiWritten by Steve Holland, Maria Ferrari, Eric Kaplan, Bill Prady, Steven Molaro, Saladin K. PattersonGuest stars H. Michael Croner
Episode 20
Sheldon spills a secret of Leonard’s when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappali goes overboard with pregnancy gifts, Wolowitz and Bernadette must draw the line.
Directed by Mark CendrowskiWritten by Chuck Lorre, Tara Hernandez, Jim Reynolds, Steve Holland, David Goetsch, Steven Molaro
Episode 21
Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.
Directed by Mark CendrowskiWritten by Steve Holland, Tara Hernandez, Maria Ferrari, Eric Kaplan, Jeremy Howe, Steven MolaroGuest stars Kevin Sussman
Episode 22
The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when she can’t go wine tasting with the group, and things don’t go as planned when Koothrappali introduces his new girlfriend, Claire.
Directed by Nikki LorreWritten by Steven Molaro, Steve Holland, Tara Hernandez, Anthony Del Broccolo, Chuck Lorre, Jim ReynoldsGuest stars Alessandra Torresani, Brian Thomas Smith
Episode 23
Sheldon hires Stuart to spend the day with Amy when he’d rather go to a movie screening. Also, Leonard’s mother, Beverly, comes to town and Penny struggles to make a connection with her.
Directed by Anthony RichWritten by Tara Hernandez, Steve Holland, Saladin K. Patterson, Eric Kaplan, Steven Molaro, Maria FerrariGuest stars Kevin Sussman, Blake Anderson, Amanda Payton, Christine Baranski
Episode 24
Chaos ensues when Leonard’s recently divorced parents, Alfred and Beverly, and Sheldon’s devoutly religious mother, Mary, come to town. Also, Wolowitz and Koothrappali think the government is out to get them when they are contacted about their guidance system.
Directed by Mark CendrowskiWritten by Steven Molaro, Tara Hernandez, Steve Holland, Adam Faberman, Chuck Lorre, Jeremy HoweGuest stars Laurie Metcalf, Judd Hirsch, Marcus Folmar, Christine Baranski
Episode information updated Sep 17, 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
