Ships disappear on route across the Arctic Sea, and a special submarine is sent to investigate.
Arthur Franz
Richard "Reef" Holloway
Dick Foran
Dan Wendover
Brett Halsey
Carl Neilson Jr.
Tom Conway
Ian Hunt
Paul Dubov
David Milburn
Bob Steele
"Grif" Griffin
Victor Varconi
Clifford Kent
Joi Lansing
Julie
Selmer Jackson
Admiral Terhune
Jack Mulhall
Justin Murdock
Jean Moorhead
Helen Milburn
Richard Tyler
Frogman Carney
Kenneth Becker
Frogman Powell
Sid Melton
Chester Tuttle
Frank Watkins
Watkins
Pat Michaels
Narrator
John Hilliard
Saucer Voice (voice)
Edmund Cobb
Passerby (uncredited)
Frank Lackteen
