Billy Halop

Billy Adams

Huntz Hall

Toby Nelson

Gabriel Dell

Bilge

Bernard Punsly

Butch

Hal E. Chester

Swab

Reed Hadley

Carl Tonjes

William Hall

Brack Warren

Mary Field

Aggie Nelson

John McGuire

Tom Adams

Marcia Ralston

Leah Carlton

Stanley Blystone

Capt. Olaf Nelson

Edward Keane

Elliott Carlton

Richard Alexander

Jenkins

Ernie Adams

Zeke

Jack Rube Clifford

Pug Anderson

Morgan Wallace

Capt. Lester

Eddie Dunn

Whaler Captain

Forrest Taylor

Fenwick the Inventor

Joe Recht

Lug

Richard Bond

Krans

James Blaine

Desk Sergeant

Ed Cassidy

Guard at Hospital

Jack Cheatham

Duke

Dick Curtis

Mate on the 'Astoria'

Larry Grenier

Island Guard

Al Hill

Speeding Motorist (archive footage)

Jerry Jerome

'Astoria' Officer

Guy Kingsford

Sven - Whaler Crewman

Jerry Mandy

Tony - Grocer

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

Anthony Rogers

Jim - Police Boat Pilot

Hans Schumm

Sub Captain

George Sherwood

Island Guard

Mickey Simpson

Angry Motorist

Tom Steele

Coral Strand Crewman / Whaler Crewman

Frank Wayne

Fenwick's Guard

Duke York

Pete - Whaler Crewman

Bill Hunter

Policeman

Bill Moss

Joe Pope

Jack Holmes

Robert R. Stephenson

Paul Huston

Screenplay

Patrick Kelley

Editor

Ford Beebe

Director

Bud Geary

Stunts

Dale Van Sickel

Stunts

Bud Wolfe

Stunts

John Rawlins

Director

Alvin Todd

Editor

Joseph Gluck

Editor

Eddie Parker

Stunts

Tom Steele

Stunts

Henry MacRae

Producer

Clarence Upson Young

Screenplay

Louis Sackin

Editor

William A. Sickner

Director of Photography

Duke York

Stunts