Alien Nation got some follow up TV movies didn't it?
Yes, five of them from 1994-7. The show had a turbulent history. It struggled to maintain enough ratings to justify its high budget, but critics, affiliates, and most of FOX's executives loved it and wanted to renew it. But FOX president Barry Diller didn't like it for some reason, and in the wake of the breakout success of
The Simpsons, the decision was made to reorient FOX to make more sitcoms. They could make 3-4 sitcoms for the cost of
Alien Nation, and that would let them expand the nascent network to more nights.
But the execs tried to find a way to keep the show, first trying to cut the budget, then settling on the TV-movie route, commissioning two movie scripts, which Barry Diller rejected sight unseen. So the project seemed dead, and Pocket Books actually went ahead and novelized the unmade movie scripts, since it was assumed they'd never see the light of day. (There was also a comic-book version of the unfilmed season 2 premiere script that was later expanded into the first movie, under the title
The Lost Episode.) But then Diller left FOX, and the new people in charge loved
Alien Nation, so they put the movie scripts back into production after all (rewriting them to make them bigger sci-fi spectacles). They were successful enough that they made three more, but the ratings on the last two fell off, so a planned sixth movie was never made.
Because of the 4-year gap between series and movie, they actually rewrote the first movie to set up the cliffhanger in a new way, essentially decanonizing the series finale, an overdone cliffhanger that was forced on the producers by network pressure and that they weren't happy with. The movies also retcon the timing of the series, bumping the timeline forward a couple of years. Otherwise, though, they're a faithful continuation that reunited most of the cast and crew of the series and kept what was good about it. And they did a better job developing some story and character threads that fell by the wayside in the series. I thought the movies were mostly very good, with the exception of the fourth movie, which was a mix of good and bad elements.
Keep an eye on my Patreon -- I've got a full revisit of
Alien Nation coming up, recapping and reviewing every episode, movie, novel, and comic.