Jean Simmons

Sophie Malraux

Trevor Howard

Maj. David Somers

Sonia Dresdel

Jess Fenton

Barry Jones

Nicholas Fenton

Kenneth More

Willy Shepley

Geoffrey Keen

Police Inspector

André Morell

Secret Service Chief Chubb (as Andre Morell)

Michael Brennan

Police Superintendent

Gerard Heinz

Dr. Karl Cesare

Lily Kann

Minna Cesare