Watch The Big Bang Theory ‘Season 1 Episode 5 – The Hamburger Postulate’ online for free in full streaming video.

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The Big Bang Theory – S1E05 – The Hamburger Postulate (Megavideo)

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Plot: Leslie invites Leonard to play cello in a musical ensemble, but they have to practice at the guys’ apartment. Once practice is over, Leslie quickly seduces Leonard for a sexual encounter. Having absolutely no experience around anyone who has actually had sex, Sheldon seeks wisdom from Penny. In spite of initial trepidation, Sheldon decides that Penny’s restaurant has a superior hamburger and will be a regular stop for him.