When I came back from Greece back in the 1990s there was a SciFi show on television called Alien Nation. In all honesty I don't remember much of the show because there was just so much to take in at that time.  That said, I did end up catching one of the made for TV movies of the series as the show was winding down and it seemed pretty nice.  Now that most of these things are available for streaming, or through DVD at your library, I thought I would actually give this show a try from the beginning.

The show follows two cops around, partners, a human (Sykes) and a "Newcomer" (Fransisco).  The show started off seeming like there would be this big story arc revolving around a conspiracy.  Sykes' former partner was killed under suspicious circumstances, the police captain was promoted to captain in the aftermath (and it seemed like Sykes was originally up for the job), so that drew me in.  Sadly, the conspiracy line was dropped and the show seemed more like it was designed to explore the  cultural norms of the Tenctonese, or "newcomers" in colloquial terms.  These are bald aliens whose ship crash-landed in the Mojave desert. The ship was made up, predominantly,  of slave labor Tenctonese, however there were some "overseers" who were there as well. They appeared to be of the same race (unlike other Science Fiction shows where the slave masters are a whole other alien species). 

The show tackles things such as patriarchy vs matriarchy, gender, intelligence, religion, and various other cultural norms, and how those clash with the human norms in California at that time period.  To some extent, I think, that this show could be considered an ideological precursor of District 9, although District 9 is more bleak. The show only had one season, and 5 made for TV movies. There are some dropped storylines, as well as plot discontinuities between the end of season 1 of the show and the movies that picked up the torch.  I doubt that this show will be remade, but there is a of material here for a reboot :-)