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Available Episodes

The Big Bang Theory
S3 | E10 The Gorilla Experiment 20 min • Expires in 5 days
S3 | E10 The Big Bang Theory 20 min • Expires January 28
Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment. ..More
The Big Bang Theory
S3 | E11 The Maternal Congruence 19 min • Expires in 5 days
S3 | E11 The Big Bang Theory 19 min • Expires January 28
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'll approve of his romance with Penny. ..More
The Big Bang Theory
S3 | E12 The Psychic Vortex 19 min • Expires in 5 days
S3 | E12 The Big Bang Theory 19 min • Expires January 28
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 girl at a university party. ..More
The Big Bang Theory
S3 | E13 The Bozeman Reaction 19 min • Expires in 5 days
S3 | E13 The Big Bang Theory 19 min • Expires January 28
A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system. ..More
The Big Bang Theory
S3 | E14 The Einstein Approximation 18 min • Expires in 5 days
S3 | E14 The Big Bang Theory 18 min • Expires January 28
Stuck on the solution to a physics problem, Sheldon seeks a number of alternative approaches to change his thinking and free the mental block; including working with Penny at The Cheesecake Factory. ..More
The Big Bang Theory
S3 | E15 The Large Hadron Collision 20 min • Expires in 5 days
S3 | E15 The Big Bang Theory 20 min • Expires January 28
When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon. ..More
The Big Bang Theory
S3 | E16 The Excelsior Acquisition 20 min • Expires in 5 days
S3 | E16 The Big Bang Theory 20 min • Expires January 28
An appearance in traffic court comes at the worst possible time for Sheldon, the same day Stan Lee is appearing at the comic book store. ..More
The Big Bang Theory
S3 | E17 The Precious Fragmentation 20 min • Expires in 5 days
S3 | E17 The Big Bang Theory 20 min • Expires January 28
The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship. ..More
The Big Bang Theory
S3 | E18 The Pants Alternative 20 min • Expires in 5 days
S3 | E18 The Big Bang Theory 20 min • Expires January 28
Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him get ready for the big night. ..More
The Big Bang Theory
S3 | E19 The Wheaton Recurrence 20 min • Expires in 5 days
S3 | E19 The Big Bang Theory 20 min • Expires January 28
Sheldon gets to square off at the bowling alley against nemesis Wil Wheaton. Meanwhile, Leonard's miffed when Penny doesn't respond the way he hoped after saying I love you. ..More
The Big Bang Theory
S3 | E20 The Spaghetti Catalyst 19 min • Expires in 5 days
S3 | E20 The Big Bang Theory 19 min • Expires January 28
Subsequent to Leonard and Penny's break-up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's. ..More
The Big Bang Theory
S3 | E21 The Plimpton Stimulation 20 min • Expires in 5 days
S3 | E21 The Big Bang Theory 20 min • Expires January 28
Sheldon hosts a visiting female physicist but her intelligence seems matched by her libido. ..More
The Big Bang Theory
S3 | E22 The Staircase Implementation 19 min • Expires in 5 days
S3 | E22 The Big Bang Theory 19 min • Expires January 28
A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting for her the story of how he met and moved in with Sheldon. ..More
The Big Bang Theory
S3 | E23 The Lunar Excitation 19 min • Expires in 5 days
S3 | E23 The Big Bang Theory 19 min • Expires January 28
Howard and Raj try to find the perfect match for Sheldon by setting him up on an Internet dating site. Seeing her new boyfriend interact with the gang makes it clear to Penny that she can't go back to dating dumb jocks after dating Leonard. ..More
The Big Bang Theory
S4 | E1 The Robotic Manipulation 20 min • Expires in 5 days
S4 | E1 The Big Bang Theory 20 min • Expires January 28
Howard uses a robotic arm for his own pleasure, and Sheldon goes on a date with Amy Farrah Fowler, his first date ever, and Penny finds herself accompanying them. ..More