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Watch The Big Bang Theory Season 2 Episode 21 online via TV Fanatic with over 2 options to watch the The Big Bang Theory S2E21 full episode. Affiliates with free and paid streaming include Amazon and iTunes.
When Wolowitz gets dumped by Leslie, Raj and Leonard take him to Las Vegas to get over his breakup. Meanwhile, Sheldon gets locked out of the apartment and has to crash at Penny's.