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
Original Story
William Shakespeare
Art Direction
Cedric Gibbons
Hairstylist
Sydney Guilaroff
Producer
Nicholas Nayfack
Original Music Composer
Bebe Barron
Hugh Hunt
Arthur Lonergan
Louis Barron
Director of Photography
George J. Folsey
Editor
Ferris Webster
Screenplay
Cyril Hume
Story
Irving Block
Allen Adler
Assistant Director
John Greenwald
Sound
James Brock
Visual Effects
Bob Abrams
Sound Editor
Kurt Hernfeld
Special Effects Technician
Franklyn Soldo
Production Design
Mentor Huebner
Set Dresser
A.D. Flowers
Logan Frazee
Joshua Meador
Irving G. Ries
Warren Newcombe
Robert Kinoshita
Glen Robinson
George Rhein
Sound Recordist
Wesley C. Miller
Doug Hubbard
John Lipow
Kendrick Kinney