The Big Bang Theory
Series 3 Episode 22

The housemate agreement is explained in a flashback to the start of Sheldon and Leonard's friendship seven years ago

The Electric Can Opener Fluctuation: Sheldon heads to Texas after learning that his friends meddled with his expedition data

First shown: Thu 17 Dec 2009 | 21 mins

The Jiminy Conjecture: Leonard and Penny feel awkward around each other after their romantic liaison

First shown: Thu 24 Dec 2009 | 21 mins

The Gothowitz Deviation: Sheldon tries to modify Penny's behaviour using chocolate

First shown: Thu 31 Dec 2009 | 20 mins

The Pirate Solution: Raj reluctantly accepts a job offer from Sheldon so that he won't be sent back to India

First shown: Thu 7 Jan 2010 | 20 mins

The Creepy Candy Coating Corollary: Sheldon enters a competition that pits him against his nemesis, Wil Wheaton from Star Trek

First shown: Thu 14 Jan 2010 | 20 mins

The Cornhusker Vortex: Sheldon teaches Leonard about football so that he can fit in with Penny's friends

First shown: Thu 21 Jan 2010 | 19 mins

The Guitarist Amplification: Sheldon is upset when Leonard and Penny argue about Penny's male friend staying over

First shown: Thu 21 Jan 2010 | 19 mins

The Adhesive Duck Deficiency: Sheldon has to come to Penny's rescue after she dislocates her shoulder in the shower

First shown: Thu 28 Jan 2010 | 20 mins

The Vengeance Formulation: Howard is scared about committing to Bernadette, so he avoids her

First shown: Thu 4 Feb 2010 | 18 mins

The Gorilla Experiment: Howard and Penny are jealous when Bernadette is fascinated with Leonard's physics project

First shown: Thu 11 Feb 2010 | 20 mins