The Big Bang Theory

Watch The Big Bang Theory

  • TV-PG
  • 2007
  • 12 Seasons
  • 8.1  (869,950)

The Big Bang Theory is a popular sitcom that aired on CBS from 2007 to 2019. It revolves around the lives of four nerdy friends, Sheldon (Jim Parsons), Leonard (Johnny Galecki), Howard (Simon Helberg), and Raj (Kunal Nayyar), as well as their love interests, Penny (Kaley Cuoco), Amy (Mayim Bialik), and Bernadette (Melissa Rauch).

The show is known for its witty humor and clever writing, as well as its relatable characters. Each episode focuses on the group's adventures, often involving their work as scientists, their relationships, and their hobbies.

The ensemble cast also includes recurring characters such as Leslie Winkle (Sara Gilbert), Stuart Bloom (Kevin Sussman), and Howard's mother, voiced by Carol Ann Susi. Later seasons introduced additional characters, such as Bernadette and Amy, who became integral parts of the show.

The Big Bang Theory features guest appearances from a variety of famous faces in science and entertainment, including Bob Newhart, Alice Amter, Aarti Mann, John Ross Bowie, Laura Spencer, Wil Wheaton, Mark Harelik, Laurie Metcalf, Margo Harshman, Brian Patrick Wade, DJ Qualls, James Hong, Riki Lindhome, Christine Baranski, Charlie Sheen, Summer Glau, Amanda Walsh, Courtney Henggeler, Jodi Lyn O'Keefe, Travis Schuldt, Michael Trucco, Stan Lee, Katee Sackhoff, Eliza Dushku, George Takei, Steven Yeun, Sara Rue, Valerie Azlynn, Lio Tipton, Courtney Ford, Judy Greer, Jen Drohan, Jesse Heiman, Casey Sander, Elizabeth Bogush, Julio Oscar Mechoso, Keith Carradine, Ryan Cartwright, Dakin Matthews, Karl T. Wright, Matt Battaglia, Kevin Smith, Frank Maharajh, Peter Onorati, Susanna Thompson, Adam West, and Joel Murray.

Fans of The Big Bang Theory can watch the entire series online, with all 12 seasons available for streaming. With its blend of geeky humor and heartwarming moments, it's no wonder that The Big Bang Theory remains a beloved sitcom for fans around the world.

Watch The Big Bang Theory online today and immerse yourself in the world of Sheldon, Leonard, and the gang. Whether you're a science nerd or just looking for a good laugh, this show is sure to deliver.

The Big Bang Theory is a series that is currently running and has 12 seasons (280 episodes). The series first aired on September 24, 2007.

The Big Bang Theory
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Unraveling the Mystery: A Big Bang Farewell
25. Unraveling the Mystery: A Big Bang Farewell
May 16, 2019
Series stars Johnny Galecki and Kaley Cuoco lead fans on a trip down memory lane, sharing some of the best-kept backstage secrets and personal memories from the past 12 years.
The Stockholm Syndrome
24. The Stockholm Syndrome
May 16, 2019
Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koothrappali makes a new friend, as the gang travels together into an uncharted future.
The Change Constant
23. The Change Constant
May 16, 2019
Everything changes as Sheldon and Amy await big news in the first of a two-part series finale.
The Maternal Conclusion
22. The Maternal Conclusion
May 9, 2019
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.
The Plagiarism Schism
21. The Plagiarism Schism
May 2, 2019
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. Also, Wolowitz is happily surprised to learn that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him back in the day.
The Decision Reverberation
20. The Decision Reverberation
April 25, 2019
Koothrappali 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.
The Inspiration Deprivation
19. The Inspiration Deprivation
April 18, 2019
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, 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
18. The Laureate Accumulation
April 4, 2019
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 leads to opportunity and conflict for Howard, Bernadette and Stuart.
The Conference Valuation
17. The Conference Valuation
March 7, 2019
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.
The D & D Vortex
16. The D & D Vortex
February 21, 2019
When 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.
The Donation Oscillation
15. The Donation Oscillation
February 7, 2019
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 aboard the "vomit comet,"
The Meteorite Manifestation
14. The Meteorite Manifestation
January 31, 2019
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.
The Confirmation Polarization
13. The Confirmation Polarization
January 17, 2019
When Sheldon and Amy's super asymmetry theory is proven by two physicists, Dr. Pemberton and Dr. Campbell from Chicago, they're thrilled, until they try to kick Amy off the Nobel nomination. Also, Bernadette has a big success at work and Penny's going to be a part of it
The Propagation Proposition
12. The Propagation Proposition
January 10, 2019
Penny'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.
The Paintball Scattering
11. The Paintball Scattering
January 3, 2019
Penny 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.
The VCR Illumination
10. The VCR Illumination
December 6, 2018
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. Also, Bernadette turns into a pageant mom when she tries to help Wolowitz ace his Magic Castle audition.
The Citation Negation
9. The Citation Negation
November 15, 2018
Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproven. Also, ultra-competitive Bernadette asks Stuart's girlfriend, Denise, to teach her how to beat Howard in a popular videogame.
The Consummation Deviation
8. The Consummation Deviation
November 8, 2018
Sheldon tries to bond with Amy's father, but when Wolowitz lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler. Also, Koothrappali and Anu try to get physical for the first time.
The Grant Allocation Derivation
7. The Grant Allocation Derivation
November 1, 2018
Leonard is caught between a rock and a hard place when he's responsible for distributing extra grant money. Also, Bernadette turns the backyard playhouse into a hideaway from her husband and kids.
The Imitation Perturbation
6. The Imitation Perturbation
October 25, 2018
When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Also, Leonard is shocked that Penny doesn't remember their first kiss.
The Planetarium Collision
5. The Planetarium Collision
October 18, 2018
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. Also, Koothrappali doesn't want Wolowitz to join him in hosting a show at the planetarium.
The Tam Turbulence
4. The Tam Turbulence
October 11, 2018
When Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend, Leonard takes matters into his own hands. Also, Bernadette and Penny take out Raj's fiancée, Anu, for dinner to get the skinny on her.
The Procreation Calculation
3. The Procreation Calculation
October 4, 2018
Life gets complicated when Stuart starts bringing his new girlfriend home; Penny and Leonard talk about starting a family; Koothrappali explores an arranged marriage.
The Wedding Gift Wormhole
2. The Wedding Gift Wormhole
September 27, 2018
Sheldon and Amy go crazy trying to figure out what "perfect gift" Leonard and Penny gave them for their wedding; Koothrappali decides to settle down and asks his father to arrange a marriage for him.
The Conjugal Configuration
1. The Conjugal Configuration
September 24, 2018
Sheldon and Amy's honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy's parents, Mr. and Mrs. Fowler. Also, Koothrappali insults physicist Neil deGrasse Tyson and starts a Twitter war.
Where to Watch The Big Bang Theory
The Big Bang Theory is available for streaming on the CBS website, both individual episodes and full seasons. You can also watch The Big Bang Theory on demand at Max, Amazon Prime, Netflix, Amazon, Vudu, TBS, Microsoft Movies & TV, Sling, Google Play and Apple TV.
  • Premiere Date
    September 24, 2007
  • IMDB Rating
    8.1  (869,950)