Kiefer said it himself that although he's signed on for 3 seasons after day 5 in his contract, it just means that they have the
option to use him for three seasons. So It's not exactly a sure thing that 24 will last for 2 more years...but I hope so, and that they not try to continue the show should Jack die.
Oh, Here's a few more videos for you guys who need more Jack.
http://www.youtube.com/profile_videos?user=cuba1976
I recommend the "24 Season 5 - You're a Traitor to this Country" and "
24 Season 3 - Im sorry we let you down..." so far, they're both EXTREMELY well done.