In the The Big Bang Theory‘s 200th episode “The Celebration Experimentation,” the gang throws a birthday party for Sheldon (Jim Parsons), surprising him with a special guest: 1960s Batman star Adam West. Recurring guest stars Christine Baranski, John Ross Bowie, Sara Gilbert and Wil Wheaton also return. “The Celebration Experimentation” premieres on CBS Thursday, Feb. 25, at 8pm ET/PT.
— The Big Bang Theory (@bigbangtheory) February 25, 2016
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