Tom Conway

as Quizmaster / Collie (voice)

as Narrator (voice)

as Dr. Louis Judd

as Paul Holland

as Man (uncredited)

as Max Collodi

as (voice) (uncredited)

as Dr. Louis Judd

as Guy Penrose

as Lord Kensington (uncredited)

as Medford

as Sir Kay

as Ian Hunt

as Sinclair

as Commodore Newcombe

as John Friday

as Whitfield Savory

as Dr. Viet

as Timothy Chappel

as Dr. Feodor Orloff

as Theodore 'Step' Allison

as Lew Lentz

as Frankie Ciro

as George Willis

as Gerry Monte aka Sabourin

as Dr. Roland Gerard

as Tom Lawrence, the Falcon

as Maurice Craindall

as Tom Lawrence

as Tom Lawrence

as Fidel

as Steve Barnes

as Mr. Blanton

as Tom Lawrence

as Tom Lawrence / The Falcon

as Tom Lawrence / The Falcon

as Tom Lawrence / The Falcon

as Tom Lawrence

as Norman Conquest

as Mark Latham

as Tom Lawrence, aka The Falcon

as Roger Kingsley

as Tom "The Falcon" Lawrence

as Tom Conway, Private Investigator

as Andrew Hendon

as Louis Berex

as Sir Roderick Strood

as Tom Martin

as Tom Martin

as Dr. Robert Davis

as Captain Ferris

as Bartlett

as Mr. Channing

as Capt. Hugh 'Bulldog' Drummond

as Jefferson van Orsdale Jr.

as Maharajah

as Morgan Pell

as Harry Nagle

as Bennington

as Christopher Adams

as Dr. Michael Madden

as Edgar Wayne

as Capt. Hugh 'Bulldog' Drummond

as John Campbell

as Dr. Wayne