Dr. Edward Morbius
Walter Pidgeon
Altaira Morbius
Anne Francis
Crewman Strong
James Drury
Crewman Randall
Harry Harvey Jr.
Crewman Lindstrom
Roger McGee
Crewman Moran
Peter Miller
Crewman Nichols
Morgan Jones
Crewman Silvers
Richard Grant
Crewman (uncredited)
James Best
William Boyett
Narrator (voice) (uncredited)
Les Tremayne
Robby the Robot (interior) (uncredited)
Frankie Darro
Commander John J. Adams
Leslie Nielsen
Robby the Robot (voice) (uncredited)
Marvin Miller
Lt. 'Doc' Ostrow
Warren Stevens
Lt. Jerry Farman
Jack Kelly
Cookie
Earl Holliman
Chief Engineer Quinn
Richard Anderson
Bosun
George D. Wallace
Crewman Grey
Robert Dix
Crewman Youngerford
Jimmy Thompson
Director
Fred M. Wilcox
Costume Design
Helen Rose
Makeup Artist
William Tuttle
Walter Plunkett
Set Decoration
Edwin B. Willis
Special Effects
A. Arnold Gillespie
Art Direction
Cedric Gibbons
Hairstylist
Sydney Guilaroff
Screenplay
Cyril Hume
Producer
Nicholas Nayfack
Original Music Composer
Bebe Barron
Louis Barron
Director of Photography
George J. Folsey
Editor
Ferris Webster
Arthur Lonergan
Hugh Hunt
Story
Irving Block
Allen Adler
Production Design
Mentor Huebner
Assistant Director
George Rhein
John Greenwald
Set Dresser
A.D. Flowers
Sound Recordist
Wesley C. Miller
Sound
James Brock
Sound Editor
Kurt Hernfeld
Joshua Meador
Warren Newcombe
Irving G. Ries
Logan Frazee
Doug Hubbard
Robert Kinoshita
Special Effects Technician
Glen Robinson
Franklyn Soldo
Visual Effects
Bob Abrams
John Lipow
Kendrick Kinney