“The Zazzy Substitution” — Wolowitz (Simon Helberg, left) and Koothrappali (Kunal Nayyar, right) are concerned as Sheldon searches for an alternative to human companionship, on THE BIG BANG THEORY, Thursday, Oct. 7 (8:00-8:31 PM, ET/PT) on the CBS Television Network.
Photo: Richard Cartwright/CBS
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