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Watch S3, EP20: The Spaghetti Catalyst with Fubo for $0 Today

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Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

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The Big Bang Theory

S3, EP20 "The Spaghetti Catalyst"

Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

The Big Bang Theory

S3, EP21 "The Plimpton Stimulation"

Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.

The Big Bang Theory

S3, EP22 "The Staircase Implementation"

Leonard tells Penny about how he met Sheldon and what happened to the elevator.

The Big Bang Theory

S7, EP10 "The Discovery Dissipation"

Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard for a week.

The Big Bang Theory

S8, EP16 "The Intimacy Acceleration"

Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love; Howard and Bernadette get into trouble at the airport.

The Big Bang Theory

S8, EP15 "The Comic Book Store Regeneration"

While the gang waits for the reopening of Stuart's comic book store Wolowitz gets some shocking news; Penny has trouble taking her own advice; Leonard and Raj think they spot Nathan Fillion at a restaurant.

The Big Bang Theory

S8, EP14 "The Troll Manifestation"

Sheldon and Leonard must defend themselves from an online bully's criticism after they co-publish a paper; Bernadette, Penny and Amy confront embarrassing moments during a girls night.

The Big Bang Theory

S8, EP13 "The Anxiety Optimization"

Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough; Wolowitz invents a game about Raj.

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, that babe-alicious waitress/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?
Starring: Aarti Mann, Brian Thomas Smith, Jim Parsons, John Ross Bowie, Johnny Galecki, Kaley Cuoco, Kaley Cuoco-Sweeting, Kate Micucci, Kevin Sussman, Kunal Nayyar, Laura Spencer, Mayim Bialik, Melissa Rauch, Simon Helberg, Wil Wheaton
Original Air Date: Sep 24, 2007
Genres: ComedyTV Series
Rating: TVPG
Playback: HD
3 seasons available on demand
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