The Final Countdown
I thought that, in its' way, a good film with a neat twist in the story; I am sure I am not the only person who wished for a sequel / different ending on the lines of ' sod corrupting the time-line, let 'em have it ! '
Then again I enjoy sci-fi and time travel stories; there was a 2-part story in 'Enterprise' - the last & possibly best in every way Star Trek derivative, much better stories & effects, a certain gritiness - where a shuttle craft entering Earth airspace was bounced by .50 bullets pinging against the hull, to find it was being attacked by Mustangs wearing swastikas - never did see the second part to know how well or not the story developed !