Answer (1 of 14): The term “continuity error” gets thrown around a lot in reference to Trek, oftentimes erroneously.
Some of the most famous “continuity errors” can be explained with a little imagination and common sense.
WHY DOES KHAN KNOW CHEKHOV IF CHEKHOV WASN’T INTRODUCED TO STAR TREK UNTI...
Even TNG is weird about that, since their method of attacking colonies is called out as being identical to the attacks along the Neutral Zone at the end of season one, so the Borg had been operating in the Federation and Romulans’ back yards for a while.
Weren’t the Borg originally meant to be those worm-parasite things?
That belief stems back to the publication of the Star Trek Chronology (2nd edition), and it might be true, but I’ve never actually seen direct confirmation from any of the writers involved.
Yyyyeahhhh… 😬 That’s not exactly planned out.
Also, the idea that Borg are fine with other beings running around their ships as long as you don’t point a phaser at them, or other aggressive gesturing I suppose. That’s out the window by the time of VOY “Dark frontier”, Janeway and Tuvok are carrying phaser rifles at the ready all around the Borg sphere.