We know most of you watched the end of Lost, but did you catch last night's FlashForward season finale, which turned out to be a series finale as well? And how about the season enders of Chuck, Fringe, Smallville and all the other returning sci-fi shows?
Some delivered cliffhangers, others attempted to wrap up their storylines neatly, but each tried in its own way to blow us away.
Which one do you think worked the best? Let us know below!