Four seasons of Lost!
Only Two more to go. Abrahms did a fanatastic step off the small screen to Mission Impossible III. I reccomend his latest film to anyone. If you like Lost then you'll like MI III because it had the Lost/Allias/Abrahms feel to it (You know, like just piano chords playing whiles we hear no dialoge or sound effects.)
I love Lost! When the series first started, my Dad reconed that they all died and went to hell and the Island, was hell. But he changed his mind now.
My favourite character is Locke, what his Dad did to him was mentally disturbing.