The Big Bang Theory
Series 2 Episode 11

At Christmas, Leonard's handsome colleague starts dating Penny, while Sheldon's obsession with gift-giving etiquette torments his friends

The Bad Fish Paradigm: Penny opens up to a reluctant Sheldon after a less-than-stellar first date with Leonard

First shown: Wed 19 Nov 2008 | 21 mins

The Codpiece Topology: When he sees Penny out on a date with another guy, Leonard rushes back to Leslie Winkle

First shown: Wed 19 Nov 2008 | 20 mins

The Barbarian Sublimation: When Penny becomes addicted to an online game, she persistently pesters Sheldon for advice

First shown: Wed 26 Nov 2008 | 20 mins

The Griffin Equivalency: Raj becomes massively arrogant when he's named in People Magazine's '30 to Watch Under 30'

First shown: Wed 26 Nov 2008 | 20 mins

The Euclid Alternative: Sheldon's friends stage an intervention to overcome his fear of driving

First shown: Wed 3 Dec 2008 | 19 mins

The Cooper-Nowitzki Theorem: Sheldon struggles to cope with a student's unexpected devotion to him

First shown: Wed 3 Dec 2008 | 20 mins

The Panty Piñata Polarization: After Sheldon bans Penny from the apartment, she retaliates with a devious plan

First shown: Wed 10 Dec 2008 | 20 mins

The Lizard-Spock Expansion: A woman who Howard has a major crush on falls for Leonard

First shown: Wed 10 Dec 2008 | 19 mins

The White Asparagus Triangulation: Sheldon is delighted that Leonard finally has a girlfriend matching his high standards

First shown: Wed 17 Dec 2008 | 20 mins

The Vartabedian Conundrum: Leonard asks Penny for advice when his relationship with Stephanie takes off too quickly

First shown: Wed 17 Dec 2008 | 20 mins