“The Gorilla Experiment” — Raj (Kunal Nayyar, right) helps Sheldon (Jim Parsons, left) take a break from attempting to help Penny understand Leonard’s work, and Wolowitz becomes jealous when Leonard starts hanging out with his new girlfriend, on THE BIG BANG THEORY, Monday, Dec. 7 (9:30-10:00 PM, ET/PT) on the CBS Television Network.
Photo: Michael Yarish/Warner Bros.
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