Robert Alda

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

Andrea King

as Julie Holden

Peter Lorre

as Hilary Cummins

Victor Francen

as Francis Ingram

J. Carrol Naish

as Police Commissario Ovidio Castanio

Charles Dingle

as Raymond Arlington

John Alvin

as Donald Arlington

David Hoffman

as Ingram's Attorney Duprex