The Big Bang Theory Season 4 Episodes

Find out where to watch Season 4 of The Big Bang Theory tonight
Overview TV Listings Seasons & Episodes Cast

Season 4 Episode Guide

Episode 1 - The Robotic Manipulation

Sheldon goes on his first date ever.
Episode 2 - The Cruciferous Vegetable Amplification

Sheldon attempts to live forever -- in a robot body.
Episode 3 - The Zazzy Substitution

Sheldon and Amy break up.
Episode 4 - The Hot Troll Deviation

Wolowitz tries to win back his ex-girlfriend, Bernadette.
Episode 5 - The Desperation Emanation

Amy wants Sheldon to meet her mother.
Episode 6 - The Irish Pub Formulation

A visit from Raj's sister creates tension among the guys.
Episode 7 - The Apology Insufficiency

An FBI agent interviews the guys when Howard needs to obtain a security clearance.
Episode 8 - The 21-Second Excitation

The guys' plans to see a movie are thwarted by Wil Wheaton.
Episode 9 - The Boyfriend Complexity

Penny pulls Leonard into a lie when her dad comes to visit.
Episode 10 - The Alien Parasite Hypothesis

Sheldon's girlfriend is attracted to another man.
Episode 11 - The Justice League Recombination

Penny's new boyfriend wants to hang out with the guys.
Episode 12 - The Bus Pants Utilisation

Leonard and Sheldon fight for control of a project.
Episode 13 - The Love Car Displacement

Wolowitz worries he can't measure up to Bernadette's ex.
Episode 14 - The Thespian Catalyst

Sheldon takes acting lessons from Penny.
Episode 15 - The Benefactor Factor

Sheldon pimps out Leonard for science.
Episode 16 - The Cohabitation Formulaton

Wolowitz must choose between his girlfriend and his mother.
Episode 17 - The Toast Derivation

Sheldon decides to get a new group of friends.
Episode 18 - The Prestidigitation Approximation

Leonard's girlfriend asks him to stop seeing Penny.
Episode 19 - The Zarnecki Incursion

Sheldon's online gaming character gets robbed.
Episode 20 - The Herb Garden Germination

Gossip spreads like wildfire - thanks to Sheldon and Amy.
Episode 21 - The Agreement Dissection

Leonard's girlfriend puts Sheldon in his place.
Episode 22 - The Wildebeest Implementation

Raj attempts to solve his problem with talking to women.
Episode 23 - The Engagement Reaction

Howard finally tells his mum he's marrying Bernadette.
Episode 24 - The Roommate Transmogrification

Raj moves in with Sheldon.


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