Contains 24 episodes from the 5th season.

Special features: The big bang theory @ 100; The big bang theory's laws of reflection; Professors of production; gag reel.

The skank reflex analysis ; The infestation hypothesis ; The pulled groin extrapolation ; The wiggly finger catalyst ; The Russian rocket reaction ; The rhinitis revelation ; The good guy fluctuation ; The isolation permutation ; The ornithophobia diffusion ; The flaming spittoon acquisition ; The Speckerman recurrence ; The shiny trinket maneuver ; The recombination hypothesis ; The beta test initiation ; The friendship contraction ; The vacation solution ; The Rothman disintegration ; The werewolf transformation ; The weekend vortex ; The transporter malfunction ; The Hawking excitation ; The stag convergence ; The launch acceleration ; The countdown reflection.

Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Mayim Bialik, Melissa Rauch.

Originally broadcast in 2011.

Regarding the opposite sex, they're on a steep learning curve. In every other sense, they're geniuses. Join physicists Leonard Hofstadter (Johnny Galecki) and Sheldon Cooper (Jim Parsons) as they ponder black holes, chemical deviations, girls, and other mysteries of the universe.

Not rated.

DVD; widescreen, 16x9 letterbox; Dolby digital 5.1 surround; dual layer.

English dialogue; subtitled in English, French, and Spanish; subtitled for the deaf and hard of hearing.