Alien Nation (1988)

A buddy cop movie with a difference: one of the cops is an alien and the other is a contemptuous, racist and xenophobic human who debases the entire alien race on a daily basis, so not exactly buddies. Nevertheless, they've a case to solve, so they knuckle down to work.
It works best if you view the aliens as representative of cultural minorities in our own society, but you can ignore that aspect completely and enjoy it as a straight up cop movie if you want because Caan and Patinkin have the kind of onscreen chemistry that would be a joy to watch even if they were investigating the murder of a goldfish.

3½ inappropriate names out of 5