Alien Nation (1988)

A few years from now, Earth will have the first contact with an alien civilisation. These aliens, known as Newcomers, slowly begin to be integrated into human society after years of quarantine but are victims of a new type of discrimination. When the first Newcomer police officer, Sam Francisco is assigned his new partner, he is given Matthew Sykes , a mildly racist veteran, the animosity between them soon gives way to respect as they investigate the Newcomer underworld, and especially Newcomer leader William Harcourt.