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Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.

Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.

More episodes

The Big Bang Theory

S3, EP18 "The Pants Alternative"

Sheldon's stage fright stands between him and a coveted award.

The Big Bang Theory

S3, EP19 "The Wheaton Recurrence"

Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off once again.

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

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, Christine Baranski, Jim Parsons, John Ross Bowie, Johnny Galecki, Kaley Cuoco, Kaley Cuoco-Sweeting, 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
Available on

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