The Big Bang TheoryS04E14

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The Big Bang Theory : The Thespian Catalyst

S04, E14 (First Aired: February 3, 2011)

Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend.

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S04, E13 (First Aired: January 20, 2011)

Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.

S04, E15 (First Aired: February 10, 2011)

A wealthy donor makes Leonard question what he is willing to do for science.

See all episodes