Robert Alda

Bruce Conrad [Conrad Ryler in on-screen end credits]

Andrea King

Julie Holden

Peter Lorre

Hilary Cummins

Victor Francen

Francis Ingram

J. Carrol Naish

Police Commissario Ovidio Castanio

Charles Dingle

Raymond Arlington

John Alvin

Donald Arlington

David Hoffman

Ingram's Attorney Duprex

Barbara Brown

Mrs. Miller

Patricia Barry

Clara the Maid

William Edmunds

Ingram's Servant Antonio

Belle Mitchell

Giovanna the Cook