"Ships disappear on route across the Arctic Sea, and a special submarine is sent to investigate."
Arthur Franz
as Richard "Reef" Holloway
Dick Foran
as Dan Wendover
Brett Halsey
as Carl Neilson Jr.
Tom Conway
as Ian Hunt
Paul Dubov
as David Milburn
Bob Steele
as "Grif" Griffin
Victor Varconi
as Clifford Kent
Joi Lansing
as Julie
Selmer Jackson
as Admiral Terhune
Jack Mulhall
as Justin Murdock
Jean Moorhead
as Helen Milburn
Richard Tyler
as Frogman Carney
Kenneth Becker
as Frogman Powell
Sid Melton
as Chester Tuttle
Frank Watkins
as Watkins
Pat Michaels
as Narrator
John Hilliard
as Saucer Voice (voice)
Edmund Cobb
as Passerby (uncredited)
Frank Lackteen
Alex Gordon
Producer
Gilbert Warrenton
Director of Photography
Jack Rabin
Story
Orville H. Hampton
Writer
Irving Block
Spencer Gordon Bennet
Director
Special Effects
Louis DeWitt
William Austin
Editor
Alexander Laszlo
Original Music Composer
Associate Producer
Don Ament
Art Direction
Henry Schrage
Co-Producer
Daniel Haller
Max Frankel
Property Master
Clark L. Paylow
Assistant Director
George Satterfield
Electrician
Judith Hart
Script Supervisor
Harry Reif
Set Decoration
Edward Morey Jr.
Production Manager
Milton Olsen
Emile LaVigne
Makeup Artist
Ralph Butler
Sound
Arthur Lane
Camera Operator
Arthur M. Broidy
Neil Brunnenkant
Music Editor
Norah Sharpe
Wardrobe Assistant
Roger J. Weinberg
Martin Greco
Sound Editor
Harry Lewis
Grip
