Day 2: 7:00 A.M.-8:00 A.M. - S2-E24
Trivia: The final scene of this episode was filmed with a "false beat" ending that showed Palmer standing up again straight after Mandy's attack and getting back into his limo. This was done to stop anyone other than the those who needed to, knowing the ending of the series before it was aired.
Chosen answer: Nobody knew, not even the writers, until at least halfway through the season when they were writing the end. They wanted to keep all options open.
Nick N.