George Sanders

Simon Templar

Helene Reynolds

Anne Bitts

Jonathan Hale

Inspector Henry Fernack

Bela Lugosi

Partner

Donald MacBride

Inspector John H. Bohlen

John F. Hamilton

Limpy

Thomas W. Ross

Professor Horatio T. Bitts

Elliott Sullivan

Monk 'Warren'

Stanley Blystone

Detective Sadler (uncredited)

Ralph Dunn

Police Sergeant (uncredited)

Byron Foulger

Ephraim Byrd (uncredited)

Billy Franey

Street Shooting Witness (uncredited)

Edward Gargan

Police Sergeant (uncredited)

William Haade

Helm Van Roon aka 'The Dutchman' (uncredited)

Donald Kerr

Card Player (uncredited)