The reason why I watched this show was that the attraction those huge bald heads caused on me, oh yeah and the fact that these aliens had several hearts and were much more powerful than humans.
The aliens came one day and stayed forever, creating as usual xenophobia between the locals and the newcomers. The good thing is that everybody learns to get along and the aliens join our society in different ways. One of them, yeah, in the police department and the magical, criminal beating, murders solving, donuts eating intergalactic couple is created.
Good show although I never knew how it ended.