Johnny Galecki
Leonard Hofstadter
Jim Parsons
Sheldon Cooper
Kaley Cuoco
Penny
Simon Helberg
Howard Wolowitz
Kunal Nayyar
Rajesh Koothrappali
Kevin Sussman
Stuart Bloom
Travis Davis
Ground Controller (voice)
Robert Clotworthy
Astronaut (voice)
Mark Cendrowski
Director
Mea Ybarra
Associate Producer
Chuck Lorre
Story
Lee Aronsohn
Bill Prady
Teleplay
Steven Molaro
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