Cast
Huntz Hall
Toby Nelson
John McGuire
Tom Adams
Ernie Adams
Zeke
Forrest Taylor
Fenwick the Inventor
Hans Schumm
Sub Captain
Duke York
Pete - Whaler Crewman
Marcia Ralston
Leah Carlton
Richard Alexander
Jenkins
Jack Rube Clifford
Pug Anderson
Eddie Parker
Coral Strand Crewman
Billy Halop
Billy Adams
William Hall
Brack Warren
Stanley Blystone
Capt. Olaf Nelson
Morgan Wallace
Capt. Lester
Richard Bond
Krans
Jerry Mandy
Tony - Grocer
House Peters Jr.
Agent Burke
James Blaine
Desk Sergeant
Jack Cheatham
Duke
Al Hill
Speeding Motorist (archive footage)
Bernard Punsly
Butch
Edward Keane
Elliott Carlton
Eddie Dunn
Whaler Captain
Ed Cassidy
Guard at Hospital
Gabriel Dell
Bilge
Reed Hadley
Carl Tonjes
Dick Curtis
Mate on the 'Astoria'
John Merton
First Island Guard
Mickey Simpson
Angry Motorist
Jack Mulhall
'Dolphin' Radioman
Paul Newlan
Chris - Second Island Guard
Jack Perrin
Island Guard-Launch Pilot