It looks like most (if not all) the footage is cribbed from the 19th episode of last season. This trailer confirms, though, that the 13-episode fifth and final season will take place 20 years from now, in a future dominated by The Observers:
It looks like most (if not all) the footage is cribbed from the 19th episode of last season. This trailer confirms, though, that the 13-episode fifth and final season will take place 20 years from now, in a future dominated by The Observers: