The Gorilla Experiment

EPISODE:

Episode Info

Sheldon takes on his greatest challenge when he attempts to help Penny understand physics, and Wolowitz becomes jealous when Leonard starts hanging out with his new girlfriend.

Cast

Kaley Cuoco
as Penny
Johnny Galecki
as Leonard
Jim Parsons
as Sheldon
Simon Helberg
as Howard Wolowitz
Kunal Nayyar
as Rajesh Koothrappali
Carol Ann Susi
as Mrs. Wolowitz
Melissa Rauch
as Bernadette
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The Gorilla Experiment Photos