Re: Which Star Trek movie has got the most plot holes? And the least?
Least: TMP. Like others said, it's a very Point A to Point B story.
Most is a tie between: TFF and FC.
-- TFF relies on Sybok getting a ship he can take over. And given that both the Klingons and Romulans would probably just kill him on sight, that leaves the Federation. And then it has to be a Feddie ship he can take over. Had it been a fully crewed and armed ship (say Excelsior for example), he'd been properly fucked over. Plus Kirk acts like an idiot: Why risk a ground engagement? Ship's phasers to stun (unless the refit did away with that option), stun the city, extract hostages, lock the rest in the brig.
There is an even bigger plot hole in TFF, It said that there were other ships are in the area, but command specfically wanted Kirk. Given that the Ent wasn't really fit for duty, all that had to do was given Kirk command of one of the starships for the duration of the mission.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.