Billy Halop

Billy Adams

Huntz Hall

Toby Nelson

Gabriel Dell

Bilge

Bernard Punsly

Butch

Reed Hadley

Carl Tonjes

Mary Field

Aggie Nelson

John McGuire

Tom Adams

Marcia Ralston

Leah Carlton

Stanley Blystone

Capt. Olaf Nelson

Richard Alexander

Jenkins

Jack Rube Clifford

Pug Anderson

Morgan Wallace

Capt. Lester

Eddie Dunn

Whaler Captain

Forrest Taylor

Fenwick the Inventor

Richard Bond

Krans

Ed Cassidy

Guard at Hospital

Dick Curtis

Mate on the 'Astoria'

Al Hill

Speeding Motorist (archive footage)

Guy Kingsford

Sven - Whaler Crewman

John Merton

First Island Guard

Jack Mulhall

'Dolphin' Radioman

Paul Newlan

Chris - Second Island Guard

Eddie Parker

Coral Strand Crewman

Jack Perrin

Island Guard-Launch Pilot

House Peters Jr.

Agent Burke

Mickey Simpson

Angry Motorist

Tom Steele

Coral Strand Crewman / Whaler Crewman

Duke York

Pete - Whaler Crewman