The science of funny is back! At work, physicists Leonard and Sheldon and their geek pals conquer the cosmos. At home, real life - from dating to driving - conquers them. This season, Leonard gets a girl. So does Sheldon. (Sheldon?) Howard drives the Mars Rover into a ditch. Raj woos a terminator. Gorgeous girl-next-door Penny falls under the spell of Age of Conan. And super-smart, uberconfident Leslie Winkle reduces mere men to spineless jellyfish. Twenty-three laugh-filled episodes from series creators Chuck Lorre ("Two And A Half Men") and Bill Prady ("Gilmore Girls") and a talented cast with astronomical comedy I.Q.s show why "Big Bang" is such a big hit. Gag Reel, Featurettes. "Physicist To The Stars": Real-Life Physicist/UCLA Professor David Saltzberg's Consulting Relationship To The Show; "Testing the Infinite Hilarity Hypothesis In Relation To 'The Big Bang Theory'": Season Two's Unique Characters and Characteristics; Spanish, French, Korean, Portuguese, Chinese, Thai Subtitles.