Short-lived but fondly remembered sci-fi TV series aired on ABC from 1967-68 and focused on architect David Vincent (Roy Thinnes), the sole witness to a flying saucer landing and the only one aware of a plot by aliens who resemble Earthlings to infiltrate and take over the planet. Remember how to spot an Invader? (Clue: look at their little finger.)

26 episodes on 7 discs. 22 1/4 hrs. Standard; Soundtrack: English Dolby Digital mono; audio commentary on one episode; interviews; more.