The Invaders

The Invaders is an American science fiction television series created by Larry Cohen that aired on ABC for two seasons, from 1967 to 1968. Roy Thinnes stars as David Vincent, who after stumbling across evidence of an in-progress invasion of aliens from outer space—the aliens disguising themselves as humans and gradually infiltrating human institutions—tries to thwart the invasion despite the disbelief of officials and the general public, and the undermining of his efforts by the aliens. The series was a Quinn Martin production.…Wikipedia