The Celebration Experimentation
S9 E17 February 25, 2016 0h 19m
★ 7.1
Source:
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Overview
After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest.
Guest Stars
Kevin Sussman
Stuart Bloom
Sara Gilbert
Leslie Winkle
John Ross Bowie
Barry Kripke
Adam West
Adam West
Wil Wheaton
Wil Wheaton
Stephen Hawking
Stephen Hawking
Christine Baranski
Beverly Hofstadter
