Watch The Big Bang Theory Season 3 Episode 11 The Maternal Congruence... 3x11 311 S03 E11 se3 ep11 03 11

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Sheldon is excited when Leonard's mother is once again visiting, however, Leonard himself is not so pleased. 3x11 311 S03 E11 se3 ep11 03 11

Watch The Big Bang Theory Season 3 Episode 10 The Gorilla Experiment 3x10 310 S03 E10 se3 ep10

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Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.
3x10 310 S03 E10 se3 ep10

Watch The Big Bang Theory Season 3 Episode 9 The Vengeance Formulation 3x9 309 S03 E09

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While Wolowitz does everything he can do to make his new relationship with Bernadette work, Sheldon vows to destroy Kripke after being humiliated on National Public Radio.3x9 309 S03 E09

Watch The Big Bang Theory season 3 Episode 6 - The Cornhusker Vortex

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Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship.