Worlds collide in Season 3! A love affair with Penny has opened a big, wide, wonderful world of romance for Leonard. But Sheldon likes the world just the way it was, thank you. All of which makes for a zany comic triangle with brainy, clueless Sheldon and practical, grounded Penny hilariously vying for the role of hypotenuse.

DVD release of episodes originally broadcast on CBS in 2009. Contains all 23 episodes from the third season. Special features: Big bang set tour; Take out with the Big bang theory; gag reel.

Disc 1. The electric can opener fluctuation ; The Jimmy conjecture ; The Gothowitz deviation ; The pirate solution ; The creepy candy coating corollary ; The cornhusker vortex ; The guitarist amplification ; The adhesive duck deficiency -- Disc 2. The vengeance formulation ; The gorilla experiment ; The maternal congruence ; The psychic vortex ; The Bozeman reaction ; The Einstein approximation ; The large Hadron collision ; The excelsior acquisition -- Disc 3. The precious fragmentation -- The pants alternative -- The Wheaton recurrence -- The spaghetti catalyst -- The Plimpton stimulation -- The staircase implementation -- The lunar excitation.