Guest Star: Dr. Neil deGrasse Tyson
You are viewing a list of Dr. Neil deGrasse Tyson's 1 appearance on The Big Bang Theory.
Season 4, Episode 7 - The Apology Insufficiency
Aired November 4, 2010
Howard is working on a new Department of Defense project and needs top-level security clearance. His friends are interviewed by the F.B.I. and each of them has reason to think their interview might have jeoparized Howard's job prospects.
Appeared as Himself