There are a lot of Lost quizzes out there that are advertised as being "the most difficult ever," but DarkUFO's Lost quiz could be the real deal. The quiz's 39 questions were selected from a pool of over 170 reader submissions. Don't expect any softball questions, like "What is Jack's father's name?"; only two questions are given the "easy" designation.

The timed quiz is definitely not for the casual fan. It was created by hard-core, eagle-eyed viewers for hard-core, eagle-eyed viewers. You're also rewarded for answering quickly, so people that linger over questions or guess at the last minute get fewer points. So far there are no perfect scores on the leaderboard (you have to register to get your score recorded), but a few people have come close.