The Big Bang Theory
Genre: Comedy
Runtime: 21 Minutes Rating: 8.8
Leonard Hofstadter and Sheldon Cooper are both brilliant physicists working at Cal Tech in Pasadena, California. They are colleagues, best friends and roommates, although in all capacities their relationship is always tested primarily by Sheldon's regimented and non-conventional ways. They are also friends with their Cal Tech colleagues,…
Support the Actors: Buy this on Amazon


Season 4, Episode 1: The Robotic Manipulation

Original Air Date—23 September 2010
Penny ends up tagging along on Sheldon's first-ever date with Amy Farrah Fowler, while Wolowitz finds an unusual use for the new robotic arm he's created.

Season 4, Episode 2: The Cruciferous Vegetable Amplification

Original Air Date—30 September 2010
When Sheldon calculates the technology to download his consciousness into a robot won't be invented soon enough, he desperately tries to find a way to increase his lifespan.

Season 4, Episode 3: The Zazzy Substitution

Original Air Date—7 October 2010
Following his breakup with Amy, the gang becomes concerned with Sheldon's obsessive search for non-human companionship, and they call his mother to intervene.

Season 4, Episode 4: The Hot Troll Deviation

Original Air Date—14 October 2010
Howard must face the music when some embarrassing information about him is revealed. Sheldon and Raj have work issues.

Season 4, Episode 5: The Desperation Emanation

Original Air Date—21 October 2010
Sheldon has doubts about continuing to date Amy after meeting her mother. Leonard laments the fact everybody except him is in a relationship.

Season 4, Episode 6: The Irish Pub Formulation

Original Air Date—28 October 2010
Raj's sister visits. Leonard doesn't tell the gang he's seeing someone.

Season 4, Episode 7: The Apology Insufficiency

Original Air Date—4 November 2010
An FBI agent interviews everyone when Howard needs to obtain a security clearance. Sheldon is beside himself when Howard refuses to accept his apology.

Season 4, Episode 8: The 21-Second Excitation

Original Air Date—11 November 2010
The guys camp out all night waiting to see a new movie while Penny and Bernadette invite Amy to her first slumber party.

Season 4, Episode 9: The Boyfriend Complexity

Original Air Date—18 November 2010
Penny asks Leonard to pose as her boyfriend when her father visits. Howard, Raj, and Bernadette are up all night looking through a telescope.

Season 4, Episode 10: The Alien Parasite Hypothesis

Original Air Date—9 December 2010
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

Season 4, Episode 11: The Justice League Recombination

Original Air Date—September 2010
The guys enter a costume contest as members of the Justice League...and convince Penny's new boyfriend to join them.

Season 4, Episode 12: The Bus Pants Utilization

Original Air Date—6 January 2011
Leonard's idea for a smartphone app derails his friendship with Sheldon.

Season 4, Episode 13: The Love Car Displacement

Original Air Date—20 January 2011
Tension runs high when everyone is staying at the same hotel for a science event and Bernadette runs into her ex-boyfriend.

Season 4, Episode 14: The Thespian Catalyst

Original Air Date—3 February 2011
To improve his skills as an instructor, Sheldon asks Penny to give him acting lessons.

Season 4, Episode 15: The Benefactor Factor

Original Air Date—10 February 2011
To secure needed funding for their school, Sheldon convinces Leonard to get friendly with a wealthy benefactor.

Season 4, Episode 16: The Cohabitation Formulation

Original Air Date—17 February 2011
As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.

Season 4, Episode 17: The Toast Derivation

Original Air Date—24 February 2011
Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.

Season 4, Episode 18: The Prestidigitation Approximation
Original Air Date—10 March 2011
Priya forces Leonard to choose between a relationship with her or a friendship with Penny. A magic trick by Howard has Sheldon fooled.