Logline
La’An travels back in time to twenty-first-century Earth to prevent an attack which will alter humanity’s future history—and bring her face to face with her own contentious legacy.
Written by David Reed
Directed by Amanda Row
Note: This is a second attempt, as technical difficulties were preventing people from seeing the original discussion post. Apologies to the people who were able to comment in the original.
It’s never been in any way realistic that most of the time travel incursions didn’t somewhat change the Prime continuity.
There are exceptions with the Guardian of Forever’s intervention, but First Contact and Voyager’s temporal interventions had to had changed the small things.
Besides, Roddenberry himself decided to change the timing of WW3 and the first human warp technology in TNG Encounter at Farpoint. There has been a change in continuity since at least that point.
This actually makes sense of it in-universe and in terms of physics.
It’s fans rigidly trying to ignore these revisions in the Prime timeline that is an issue in terms of physics.