Continuity mistake: In Episode 15 (Day 1), the pregnancy test that Teri takes to the bathroom is a "TrueBlue" (close up shot on it), but the one that Kim finds there is a "ClearBlue". (00:13:07 - 00:19:57)
Continuity mistake: At one point during Alberta Green's debrief of Jack, the shot changes to a split screen. In the left box, Jack stands up from the table before he does in the right box. (00:04:05)
Continuity mistake: When entering the safe-house Nina walks past the lit lamp on a side table. Seconds later when Mrs. Bauer walks past, it is switched off. (00:11:15)
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.