The Big Bang Theory Episodes

2007, TV Show

The Big Bang Theory Season 3 episodes

The Lunar Excitation Season 3, Episode 23

In the third-season finale, Wolowitz and Koothrappali play matchmaker for Sheldon by setting up an online-dating profile for him. Meanwhile, Penny thinks that her relationship with Leonard has affected her ability to date "normal" men. read more

The Staircase Implementation Season 3, Episode 22

Leonard tells Penny the story of how he met Sheldon. read more

The Plimpton Stimulation Season 3, Episode 21

The arrival of a famous physicist (Judy Greer), has Sheldon and Leonard competing for her attention. read more

The Spaghetti Catalyst Season 3, Episode 20

Sheldon tells a lie to appease Penny and Leonard, who aren't speaking to each other, but then he gets caught. read more

The Wheaton Recurrence Season 3, Episode 19

Wil Wheaton returns and once again battles with Sheldon, this time in a bowling match; and Penny and Leonard have a fight that threatens their relationship. read more

The Pants Alternative Season 3, Episode 18

The friends try to help Sheldon overcome his fear of speaking in public. read more

The Precious Fragmentation Season 3, Episode 17

The guys go to a garage sale and find a ring from "The Lord of the Rings" film, and the rare find threatens their friendship. read more

The Excelsior Acquisition Season 3, Episode 16

Sheldon misses an opportunity to meet comics mogul Stan Lee, who appears in a cameo, when he has to go to traffic court after getting a ticket because of Penny. read more

The Large Hadron Collision Season 3, Episode 15

Leonard is only allowed to bring one guest for his trip to the CERN science complex in Switzerland, and he's forced to choose between Sheldon and Penny. read more

The Einstein Approximation Season 3, Episode 14

Newton had his apple. Sheldon has cheesecake. An impasse in his work leads Sheldon to get a job working with Penny at a restaurant known for that dessert. read more

The Bozeman Reaction Season 3, Episode 13

Leonard and Sheldon's apartment is robbed, so they create an elaborate security system with the help of their friends. read more

The Psychic Vortex Season 3, Episode 12

Sheldon helps Koothrappali pick up women at a university mixer; and Leonard is shocked to learn that Penny believes in psychics. Abby: Danica McKellar. read more

The Maternal Congruence Season 3, Episode 11

Leonard's mother (Christine Baranski) visits, which pleases Sheldon but upsets Leonard. read more

The Gorilla Experiment Season 3, Episode 10

Sheldon tries to teach Penny physics so she'll understand Leonard's work; Wolowitz is jealous when Leonard bonds with his girlfriend. read more

The Vengeance Formulation Season 3, Episode 9

Sheldon is humiliated on National Public Radio and vows vengeance on Kripke; and Wolowitz begins a relationship with Katee Sackhoff, who appears in a cameo. Ira Flatow also makes a cameo appearance. read more

The Adhesive Duck Deficiency Season 3, Episode 8

After the guys, except for Sheldon, go camping, Penny is injured and left with only Sheldon to come to her rescue. read more

The Guitarist Amplification Season 3, Episode 7

Leonard and Penny fight, and Sheldon mediates. read more

The Cornhusker Vortex Season 3, Episode 6

Sheldon tries to teach Leonard the fundamentals of football, while Raj and Howard quarrel over an incident involving kites. read more

The Creepy Candy Coating Corollary Season 3, Episode 5

Sheldon enters a trading-card competition when he hears Wil Wheaton (in a cameo), for whom he harbours resentment, is also participating. Meanwhile, Wolowitz asks Penny to set him up with one of her friends. read more

The Pirate Solution Season 3, Episode 4

Raj needs to find a new job or he will be sent back to India, so Sheldon hires Raj to work for him. Meanwhile, Leonard and Penny need to explain the "three's company" concept to Howard. read more

The Gothowitz Deviation Season 3, Episode 3

Sheldon tries to change Penny through behaviour modification, using chocolate as motivation. Meanwhile, Howard and Raj try to pick up women at a Goth nightclub. read more

The Jiminy Conjecture Season 3, Episode 2

Sheldon and Howard consult an entomologist (Lewis Black) to help settle a bet---with their favorite comic books at stake---regarding a species of cricket. Meanwhile, Leonard and Penny try to figure out what's next after an awkward first attempt at intimacy. read more

The Electric Can Opener Fluctuation Season 3, Episode 1

In the third-season opener, Sheldon feels betrayed when his friends alter his arctic-expedition data, so he takes off for Texas. The guys follow him, which kills Leonard's chance for a romantic meeting with Penny. read more

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Premiered: September 24, 2007, on CBS
Rating: TV-PG
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Premise: Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated.

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