Trek time travel explicitly has characteristics of both the branching-multiverses model and the single-rewriteable-timeline one. The mixture, on whatever theoretical basis it may rest, seems to serve the needs of the Borg perfectly: past deeds propagate from the "branching point" to multiple branches, including (at least, and significantly) the one the heroes or villains care about and start out from. If they didn't, everybody would just Slide to the preferred universe, rather than bother to go back to the branching point where somebody in some reality fixed things anyway. But OTOH heroes and villains do travel back to do fixes - perhaps merely in order to be sure, perhaps because Sliding is hard to do, perhaps for esoteric necessity X.
The result in any case is a predestination paradox, most of the time. Although probably depending on which specific version of our heroes/villains the camera chooses to follow.
Timo Saloniemi
The result in any case is a predestination paradox, most of the time. Although probably depending on which specific version of our heroes/villains the camera chooses to follow.
Timo Saloniemi