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
