Day 2: 2:00 A.M.-3:00 A.M. - S2-E19
Audio problem: When Tony tells Michelle that he told the president about the chip Jack found, they cut to a different angle, and Tony is still speaking, but his lips aren't moving.
Day 2: 7:00 A.M.-8:00 A.M. - S2-E24
Audio problem: In the french-dubbed over version, in the last seconds of the episode, just after Palmer has fainted and the camera is zooming out and the sound is fading, you can just make out his secretary shouting "Help", in english.
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.