Space travellers journey to an unexplored world, where another spaceship disappeared without trace 20 years previously. They find the planet inhabited only by mysterious scientist Dr Morbius, his beautiful daughter and their robot servant. However, Morbius doesn't take kindly to intruders entering his domain and it soon becomes clear that sinister forces are at work beneath the planet's idyllic facade. Sci-fi drama loosely based on Shakespeare's The Tempest, starring Walter Pidgeon, Anne Francis, Leslie Nielsen and Warren Stevens.

Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for twenty years. They find themselves unwelcome by the expedition's lone survivor and warned of destruction by an invisible force if they don't turn back immediately.