The Big Bang Theory: 10 Questions That Still Need Answering

9. Where Did Stuart Come From?

Stuart simply exists. Nobody really knows how he got there, nobody knows why, nobody knows anything about him other than what we've seen on screen. He fills in some minor blanks, like how he spends his evenings being stood up by stray cats, but will we ever see his backstory? I'm going all-out and saying Stuart is the best character of them all, with his tragic tales providing immense laughs throughout his time on the show. We know that his parents are still alive, but will we ever find out about them, or actually see them in an episode?