The Big Bang Theory
12 Seasons

The Big Bang Theory

: Leonard and Sheldon learn about the social aspects of life through their relationships with the beauty who lives next door.

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1. Pilot

Brilliant physicists Leonard and Sheldon meet new neighbor Penny, who shows them...

The Big Bran Hypothesis
2. The Big Bran Hypothesis

Leonard volunteers to sign for a package to make a good impression on Penny, but...

The Fuzzy Boots Corollary
3. The Fuzzy Boots Corollary

Leonard asks a work colleague out after he finds out Penny is seeing someone.

The Luminous Fish Effect
4. The Luminous Fish Effect

Sheldon gets fired and explores what life has to offer outside physics, leaving ...

The Hamburger Postulate
5. The Hamburger Postulate

Fearing he's wasting his time on Penny, Leonard makes a connection with Leslie. ...

The Middle Earth Paradigm
6. The Middle Earth Paradigm

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz and Koothrappa...

The Dumpling Paradox
7. The Dumpling Paradox

When Wolowitz goes AWOL with one of her friends, Penny's recruited to fill in fo...

The Grasshopper Experiment
8. The Grasshopper Experiment

Raj's parents set him up on a blind date, and when he discovers he can talk to h...

The Cooper-Hofstadter Polarization
9. The Cooper-Hofstadter Polarization

When they're invited to present at a physics conference, Sheldon's reluctance to...

The Loobenfeld Decay
10. The Loobenfeld Decay

Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent...

The Pancake Batter Anomaly
11. The Pancake Batter Anomaly

With his friends knowing how sour he acts when sick and avoiding him as a result...

The Jerusalem Duality
12. The Jerusalem Duality

Sheldon is rattled and impossible to be around after meeting Dennis, a 15-year-o...

The Bat Jar Conjecture
13. The Bat Jar Conjecture

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with...

The Nerdvana Annihilation
14. The Nerdvana Annihilation

When the delivery of a full-size prop of 1960's "The Time Machine" causes Penny ...

The Pork Chop Indeterminacy
15. The Pork Chop Indeterminacy

The gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is ...

The Peanut Reaction
16. The Peanut Reaction

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at a...

The Tangerine Factor
17. The Tangerine Factor

Penny's breakup spurs Leonard to summon the courage to ask her out, and they bot...

The Big Bang Theory




12 Seasons Available (279 Episodes)

Release Year


Rating Information


About This Series

Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then waitress but aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?

Cast and Crew

Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Kevin Sussman

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