Tom Conway

as Lord Kensington (uncredited)

as Quizmaster / Collie (voice)

as Dr. Feodor Orloff

as Ian Hunt

as Bartlett

as Harry Nagle

as Sinclair

as Guy Penrose

as Commodore Newcombe

as Dr. Roland Gerard

as Dr. Wayne

as Gerry Monte aka Sabourin

as Timothy Chappel

as Sir Roderick Strood

as Tom Martin

as Max Collodi

as Inspector

as John Wellington (uncredited)

as George Willis

as Tom Martin

as Sir Kay

as Maharajah

as Tom Conway, Private Investigator

as Norman Conquest

as Fidel

as Narrator (voice)

as Roger Kingsley

as Bennington

as Dr. Viet

as Ned Johnson

as John Campbell

as Christopher Adams

as Whitfield Savory

as Dr. Michael Madden

as Capt. Hugh 'Bulldog' Drummond

as Capt. Hugh 'Bulldog' Drummond

as John Friday

as Jefferson van Orsdale Jr.

as Dr. Robert Davis

as Tom "The Falcon" Lawrence

as Steve Barnes

as Tom Lawrence

as Lew Lentz

as Tom Lawrence / The Falcon

as Theodore 'Step' Allison

as Tom Lawrence

as Tom Lawrence, aka The Falcon

as Mark Latham

as Tom Lawrence / The Falcon

as Tom Lawrence, the Falcon

as Dr. Louis Judd

as Tom Lawrence / The Falcon

as Paul Holland

as Tom Lawrence

as Dr. Louis Judd

as Tom Lawrence

as Man (uncredited)

as Frankie Ciro

as Maurice Craindall

as Louis Berex

as Medford

as Mr. Blanton

as Mr. Channing

as Morgan Pell

as Captain Ferris

as Edgar Wayne

as Andrew Hendon

as (voice) (uncredited)