The Big Bang Theory - Season 3

Worlds collide in Season 3! A love affair with Penny has opened a big, wide, wonderful world of romance for Leonard. But Sheldon likes the world just the way it was, thank you. All of which makes for a zany comic triangle with brainy, clueless Sheldon and practical, grounded Penny hilariously vying for the role of hypotenuse.

23 Episodes

The Electric Can Opener Fluctuation

Season 3 - Episode 1

When Sheldon learns the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the g...

The Jiminy Conjecture

Season 3 - Episode 2

Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determi...

The Gothowitz Deviation

Season 3 - Episode 3

Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modific...

The Pirate Solution

Season 3 - Episode 4

Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as a third ...

The Creepy Candy Coating Corollary

Season 3 - Episode 5

After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one...

The Cornhusker Vortex

Season 3 - Episode 6

Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendshi...

The Guitarist Amplification

Season 3 - Episode 7

A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altrui...

The Adhesive Duck Deficiency

Season 3 - Episode 8

With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.

The Vengeance Formulation

Season 3 - Episode 9

After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship wit...

The Gorilla Experiment

Season 3 - Episode 10

Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging o...

The Maternal Congruence

Season 3 - Episode 11

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she...

The Psychic Vortex

Season 3 - Episode 12

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a...

The Bozeman Reaction

Season 3 - Episode 13

When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

The Einstein Approximation

Season 3 - Episode 14

Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.

The Large Hadron Collision

Season 3 - Episode 15

Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator)...

The Excelsior Acquisition

Season 3 - Episode 16

Sheldon winds up in traffic court when he gets a ticket because of Penny.

The Precious Fragmentation

Season 3 - Episode 17

When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.

The Pants Alternative

Season 3 - Episode 18

Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.

The Wheaton Recurrence

Season 3 - Episode 19

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

The Spaghetti Catalyst

Season 3 - Episode 20

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

The Plimpton Stimulation

Season 3 - Episode 21

Leonard and Sheldon compete for the attention of a famous female physicist.

The Staircase Implementation

Season 3 - Episode 22

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

The Lunar Excitation

Season 3 - Episode 23

While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.