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. Plot Roy Thinnes stars as architect David Vincent, who accidentally learns of a secret alien invasion already underway and thereafter travels from place to place attempting to foil the aliens' plots and warn a skeptical populace of the danger. A plot format of a man-on-the-run and of a lone man attempting to warn the human public about alien infiltration, are shared from The Fugitive, and Coronet Blue two former Quinn Martin's productions, and 50's movies like Invasion of the Body Snatchers and I Married a Monster from Outer Space, respectively. Other plot elements include Vincent's grim and lonely determination to find "tangible proof of the invaders’ existence" despite having become a "quasi-famous object of public ridicule"; the aliens' success in hiding their plots, undermining Vincent's credibility and killing off those who also discover them in ways disguised as a natural death; the constant tension over whether the individuals Vincent comes across are humans or aliens. As the series progresses, Vincent is able to convince a small number of people to help him fight the aliens. In many episodes, at least one individual, often a key figure such as a U.S. Air Force intelligence officer (in the episode "The Innocent"), a police officer (in "Genesis" and "The Spores"), a U.S. Army major ("Doomsday Minus One"), or a NASA official ("Moonshot") would become aware of the alien threat and survive the episode in which he or she was introduced. In "The Leeches", a millionaire (Arthur Hill) survives an alien abduction after being rescued by Vincent, while in "Quantity: Unknown" a scientist (Susan Strasberg) is convinced of alien technology. In "The Saucer", guest stars Anne Francis and Charles Drake witness an alien saucer's landing. In the second season, larger groups of surviving witnesses were featured, as in episodes "Dark Outpost" and "The Pursued", and three scientists in "Labyrinth". Most significant of these is millionaire industrialist Edgar Scoville (Kent Smith), who became