Continuity mistake: When Jack is outside Dunlop Plaza, talking to Nina on the phone, he says, "Nina, it's Jack." But the transcript Tony looks at a few seconds later reads, "Nina, it's me, Jack." (00:17:15 - 00:18:00)
Visible crew/equipment: Jack Bauer and his boss are in a building at night with a shooter hidden somewhere. They open a door and look very carefully to the right and then to the left before going through the door. On the right side you can briefly see two crew members and as the camera pulls forward they back up some so they won't be seen. (00:23:50)
Continuity mistake: Shortly after the clock display reads 01:44, the time is shown again... and it's 01:42. (00:29:20 - 00:30:25)
Continuity mistake: When Richard is shot and on the floor, there is a blood blob above his shirt pocket that keeps disappearing and reappearing. (00:35:10)
Visible crew/equipment: When Teri Bauer and Alan York are cleaning up the mess in the furniture store, you can see a mic moving on the left side behind a plant (while the camera is near the floor).
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.