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The Big Bang Theory S04E15

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The Big Bang Theory : The Benefactor Factor

S04, E15 ()

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

TV-14  (D)

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Previous Episode

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.

Next Episode

The Cohabitation Formulation

S04, E16 (First Aired: February 17, 2011)

Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.