Question: Who was the director of the flim in which an American actor, known for playing Stuart Bloom on the CBS sitcom "The Big Bang Theory", was a star??
Sentence (from "Johnny Galecki"): He is known for playing David Healy in the ABC sitcom "Roseanne" from 1992 to 1997 and Dr. Leonard Hofstadter in the CBS sitcom "The Big Bang Theory" since 2007.
Relevant evidence: No