"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
Irving Block
Story
Jack Rabin
Spencer Gordon Bennet
Director
Alex Gordon
Producer
Gilbert Warrenton
Director of Photography
Orville H. Hampton
Writer
Special Effects
Alexander Laszlo
Original Music Composer
William Austin
Editor
Louis DeWitt
Henry Schrage
Co-Producer
Associate Producer
Don Ament
Art Direction
Daniel Haller
Harry Reif
Set Decoration
Emile LaVigne
Makeup Artist
Ralph Butler
Sound
Arthur M. Broidy
Assistant Director
Neil Brunnenkant
Music Editor
George Satterfield
Electrician
Edward Morey Jr.
Production Manager
Clark L. Paylow
Milton Olsen
Norah Sharpe
Wardrobe Assistant
Martin Greco
Sound Editor
Judith Hart
Script Supervisor
Max Frankel
Property Master
Arthur Lane
Camera Operator
Roger J. Weinberg
Harry Lewis
Grip
