Trama:
Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for 20 years, only to find themselves unwelcome by the expedition's lone survivor and warned of destruction by an invisible force if they don't turn back immediately.

Cast:

Walter Pidgeon Dr. Edward Morbius

Anne Francis Altaira Morbius

Leslie Nielsen Commander John J. Adams

Warren Stevens Lt. 'Doc' Ostrow

Jack Kelly Lt. Jerry Farman

Marvin Miller Voice of Robby the Robot

Earl Holliman Cookie

Richard Anderson Chief Engineer Quinn

George Wallace Bosun

Robert Dix Crewman Grey

Jimmy Thompson Crewman Youngerford

James Drury Crewman Strong

Harry Harvey Jr. Crewman Randall

Roger McGee Crewman Lindstrom

Peter Miller Crewman Moran

Morgan Jones Crewman Nichols

Richard Grant Crewman Silvers

James Best Crewman (uncredited)

William Boyett Crewman (uncredited)

Les Tremayne (voce) Narrator (uncredited)

Frankie Darro Robby the Robot (interior) (uncredited)

Supporto: Sconosciuto,

In prestito: No

Rapporto: Unknown