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The Big Bang Theory S4E15 poster

Watch The Big Bang Theory – Season 4 Episode 15: The Benefactor Factor

The Big Bang Theory • Season 4, Episode 15 • 20 min • 2007 • ⭐ 7.9/10 • Comedy

Cast: Jim Parsons , Kaley Cuoco , Johnny Galecki , Simon Helberg , Kunal Nayyar , Melissa Rauch , Mayim Bialik

Directors: Chuck Lorre , Bill Prady

Watch The Big Bang Theory – S4E15

Episode Overview

A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.

Episode Navigation

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