Day 2: 11:00 P.M.-12:00 Midnight - S2-E16
Other mistake: In German Television the clock at the end switches from 23:59:59 to 23:00:00.
Day 2: 5:00 A.M.-6:00 A.M. - S2-E22
Other mistake: In the beginning of the episode when the show is starting and the credits are rolling, instead of Billy Burke the credit is shown as Billy Gurke.
Day 2: 6:00 A.M.-7:00 A.M. - S2-E23
Other mistake: When President Palmer is at District Headquarters, he addresses one of the workers as "Heather," but the character is credited as "Linda."
Day 2: 7:00 A.M.-8:00 A.M. - S2-E24
Other mistake: In the shootout at the stadium, several times when Jack fires a gun the sound of the gun firing is heard but it is obvious that the gun did NOT fire. Most noticeable when Jack fires the third shot at the man behind the wall and when he is struggling for the gun with the last guy who he beats up.
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.