Special Guest Stars Laurence Naismith as Cyrus Stone Guest Stars Kent Smith as Edgar Scoville Alfred Ryder as The Invader Leader Anthony Eisley as Bob Torin Karen Black as Claudia Stone Co Starring Christopher Held as Lieutenant Joe Quinn as Policeman Lawrence Montaigne as Garth John S. Ragin as Kant Ron Husmann as Sentry John Graham as Colonel Gentry Uncredited William Woodson as Narrator