“The Einstein Approximation” — Sheldon’s search for the answer to a physics problem amuses Leonard (Johnny Galecki, left) and Penny (Kaley Cuoco, right), until it leads him to work at the Cheesecake Factory, on THE BIG BANG THEORY, Monday, Feb. 1 (9:31-10:00 PM, ET/PT) on the CBS Television Network.
Photo: Sonja Flemming/CBS
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