Phantom Raiders

Nat Pendleton

'Gunboat' Jacklin

Cecil Kellaway

Franklin Morris

John Carroll

John Ramsell Jr.

Steffi Duna

Dolores

Dwight Frye

Eddie Anders

Matthew Boulton

John Ramsell Sr.

Harry Tyler

Cafe Waiter

Joe Yule

Sailor

Alec Craig

Andy MacMillan

Thomas W. Ross

Dr. Grisson

Hugh Beaumont

Seaman

Guy Bellis

Pierson - Sir Edward's Aide

Dick Botiller

Taurez's Henchman

John Burton

Steve Donnigan of Scotland Yard (uncredited)

Charles Coleman

U.S. Agent Hilton

Franco Corsaro

Ysidro - Morris' Head Clerk (uncredited)