Posting to register my great admiration for "Что? Где? Когда?" It was a great show, and was a part of what inspired me as a kid to get into math/science. A lot of the contestants were very smart grad students, as I recall. I am very sad there isn't such a show in the Western world, it's all of the form of "* got talent" which is about picking entertainers, or "Jeopardy" which is about silly trivia. :(

KVN is also partly about wit/quick thinking, of course. My hometown's KVN team ("the Odessa gentlemen") was universally feared :).