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The Big Bang Theory (OAD: )

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The Big Bang Theory : The Gorilla Experiment


Sheldon tries to help Penny understand Leonard's work; Wolowitz gets jealous when Leonard starts hanging out with his new girlfriend.

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Previous Episode

The Vengeance Formulation

(First Aired: November 23, 2009)

After being humiliated on the radio, Sheldon vows to destroy Kripke; Wolowitz tries to not ruin his new relationship with Bernadette.

Next Episode

The Maternal Congruence

(First Aired: December 14, 2009)

Leonard is horrified when his mother (Christine Baranski) visits.