"A team of American astronauts leave their space station on the first mission to Mars, but the captain's religious beliefs may get in the way."
Walter Brooke
as Gen. Samuel T. Merritt
Eric Fleming
as Capt. Barney Merritt
Mickey Shaughnessy
as Sgt. Mahoney
Phil Foster
as Jackie Siegle
William Redfield
as Roy Cooper
William Hopper
as Dr. George Fenton
Benson Fong
as Imoto
Ross Martin
as Andre Fodor
Vito Scotti
as Sanella
John Dennis
as Donkersgoed
Michael Fox
as Elsbach
Joan Shawlee
as Rosie McCann
Iphigenie Castiglioni
as Mrs. Heinz Fodor
Rosemary Clooney
as Musical Number (archive footage) (uncredited)
Barré Lyndon
Adaptation
George Worthing Yates
Byron Haskin
Director
Philip Yordan
Frank R. McKelvy
Set Decoration
Jan Domela
Visual Effects
John P. Fulton
J. McMillan Johnson
Art Direction
Wally Westmore
Makeup Artist
Ivyl Burks
Chesley Bonestell
Book
Frank Freeman Jr.
Associate Producer
Hal Pereira
George Pal
Producer
Everett Douglas
Editor
Paul K. Lerpae
Willy Ley
Lionel Lindon
Director of Photography
Irmin Roberts
Van Cleave
Original Music Composer
Sam Comer