A double bill of sci-fi thrillers. In 'Capricorn One' the capsule of the first manned flight to Mars burns up on re-entry into Earth's atmosphere but all is not as it seems. A reporter discovers that NASA faked the whole flight and landing with the crew in the desert, for the benefit of television. Only the astronauts can tell the world the true story, but the government wants them dead. In 'Saturn 3', research scientists Adam (Kirk Douglas) and Alex (Farrah Fawcett) enjoy an idyllic existence on a remote space station until they are joined by inventor Benson (Harvey Keitel). Determined to create a super-race of robots, Benson manufactures a prototype, Hector, who gradually develops a mind of his own - taking on some of the more unpleasant aspects of his creator's personality in the process. The arrival at the station of the psychotic Captain James proves to be a catalyst for Hector to go on the rampage: but will his developing passion for Alex help or hinder the crew?