Diretor/a
Alan James
DIRETOR/A
William Witney
Elenco (na ordem dos créditos)
Ralph Byrd
Lt. Terry Kent
Bela Lugosi
Boroff
Maxine Doyle
Jean Norman
Richard Alexander
Thorg
Lee Ford
Snapper McGee
Herbert Rawlinson
Cmdr. Boyle
John Picorri
G.A. Rackerby [Chs. 2-12]
Lawrence Grant
Rabinisi - Boroff's Spokesman at Screening [Ch. 1]
Thomas Carr
Ens. Jim Kent [Ch. 1]
Carleton Young
Henchman Dodds [Ch. 4]
Allen Connor
Dick Norman
George Chesebro
L.H. Degado - Chief Thug [Ch. 5]
Ranny Weeks
Wies - Ambulance Orderly Thug [Ch. 4]
Roy Barcroft
Goebel (uncredited)
Richard Beach
Seaman (uncredited)
Earle D. Bunn
Kelp Plant Heavy 1 (uncredited)
Yakima Canutt
Steve Carruthers
Wireless Operator (uncredited)
Ed Cassidy
Capt. Johnson (uncredited)
Jack Rube Clifford
Carver (uncredited)
Baldwin Cooke
Floyd Criswell
Motorcycle Heavy (uncredited)
Jack Daley
S.S. Carfax Captain (uncredited)
Leon Davidson
Forrest Dillon
Sea Wolf Thug (uncredited)
Lester Dorr
Hospital Radium-Tech (uncredited)
Curley Dresden
Dock Heavy 1 (uncredited)
Robert Dudley
Pierport Station Agent (uncredited)
Norwood Edwards
Frank Ellis
Kelp Plant Worker (uncredited)
Frank Fanning
Roadside Police Sergeant (uncredited)
Jerry Frank
Lee Frederick
Citizen (uncredited)
Audrey Gaye
Phone Switchboard Supervisor (uncredited)
Joseph W. Girard
Cmdr. Green (uncredited)
Kit Guard
Kelp Plant Heavy 2 (uncredited)
Henry Hale
Krohn (uncredited)
Sam Harris
Emissary (uncredited)
Jack Ingram
Warren Jackson
Boat Heavy #4 (uncredited)
Payne B. Johnson
Boy in Lifeboat (uncredited)
Jerry Larkin
Henchman (uncredited)
Rex Lease
Coast Guard Orderly (uncredited)
Alexander Leftwich
Froman (uncredited)
Jack Long
Joseph P. Mack
S.S. Adamic Captain (uncredited)
Teddy Mangean
Gene Marvey
Blake (uncredited)
Frankie Marvin
Sniper (uncredited)
Frank Meredith
Cop (uncredited)
James Millican
Dock Heavy 4 (uncredited)
Pat Mitchell
Radioman (uncredited)
King Mojave
Ambulance Driver-Thug (uncredited)
Edwin Mordant
Dr. Meade (uncredited)
Michael Morgan
Moore - Coast Guardsman (uncredited)
Henry Morris
Dock Heavy 2 (uncredited)
Charles Murphy
S.S. Adamic Mate (uncredited)
John Mustill
Policeman (uncredited)
Henry Otho
S.S.'Carfax Mate (uncredited)
Eddie Phillips
Boat Heavy 1 (uncredited)
Loren Riebe
Pete (uncredited)
Vinegar Roan
Dock Heavy 3 (uncredited)
Jack Roberts
Jones (uncredited)
Buddy Roosevelt
Patrol Boat Lt. Scott (uncredited)
Dick Scott
Gang Launch Pilot (uncredited)
Reed Sheffield
Thug Loading Launch (uncredited)
Dick Sheldon
Ambulance Attendant-Thug (uncredited)
Harry Strang
Phone Company Code Expert (uncredited)
Duke Taylor
Loader (uncredited)
Tom Ung
Charlie (uncredited)
Billie Van Every
Phone Operator (uncredited)
Robert Walker
Black (uncredited)
Frank Wayne
Payne (uncredited)
Herbert Weber
Belden (uncredited)
Robert J. Wilke
Robert B. Williams
Sloan (uncredited)
Roger Williams
Dan Wolheim
Capt. Slauson (uncredited)
Duke York
Sea Heavy #1 (uncredited)