The Big Bang Theory

Penny opens up to a reluctant Sheldon after a disappointing first date with Leonard (S2 Ep1)

When Penny starts dating another guy, Leonard rushes back to Leslie Winkle (S2 Ep2)

When Penny becomes addicted to an online game, she pesters Sheldon for advice (S2 Ep3)

Raj becomes arrogant when he's named in People Magazine's '30 to Watch Under 30' (S2 Ep4)

Sheldon's friends stage an intervention to overcome his fear of driving (S2 Ep5)

Sheldon struggles to cope with a student's unexpected devotion to him (S2 Ep6)

The Panty Pinata Polarization: Penny retaliates after Sheldon bans her from the apartment (S2 Ep7)

A woman who Howard has a crush on falls for Leonard, despite Howard's advances (S2 Ep8)

Leonard finally gets a girlfriend matching Sheldon's high standards (S2 Ep9)

Leonard seeks Penny's advice when his relationship with Stephanie moves too fast (S2 Ep10)

Sheldon's obsession with festive gift-giving etiquette torments his friends (S2 Ep11)

Kripke challenges the boys to a robot duel (S2 Ep12)

Sheldon develops a scientific procedure for making friends (S2 Ep13)

When Sheldon lends Penny some money, it brings her Kurt back into her life (S2 Ep14)

A disastrous visit from Leonard's mother has an unexpected side-effect (S2 Ep15)

Penny accidentally shoots one of Sheldon's cushions during a game of paintball (S2 Ep16)

The boys discover that sci-fi actress Summer Glau is on the same train as them (S2 Ep17)

Sheldon gets involved in Penny's home-based business selling hair accessories (S2 Ep18)

Penny develops a rivalry with an attractive new neighbour (S2 Ep19)

Leonard is devastated when Stuart from the comic book shop flirts with Penny (S2 Ep20)

Leonard and Raj take a heartbroken Howard to Las Vegas (S2 Ep21)

Penny makes a surprising revelation on her second date with Stuart (S2 Ep22)

Leonard's plan to spend the summer at the North Pole scuppers things with Penny (S2 Ep23)