“The Gorilla Experiment” — Wolowitz (Simon Helberg, center) becomes jealous when Leonard (Johnny Galecki, right) starts hanging out with his new girlfriend (Melissa Rauch, left), 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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