Ralph Richardson as Baines

Michèle Morgan as Julie

Sonia Dresdel as Mrs. Baines

Bobby Henrey as Phillipe

Denis O'Dea as Inspector Crowe

Jack Hawkins as Detective Ames

Walter Fitzgerald as Dr. Fenton

Dandy Nichols as Mrs. Patterson

Joan Young as Mrs. Barrow

Karl Stepanek as First Secretary

Gerard Heinz as Ambassador

Torin Thatcher as Policeman

James Hayter as Perry

Geoffrey Keen as Detective Davis

Bernard Lee as Detective Hart

John Ruddock as Dr. Wilson

Hay Petrie as Clock Winder

Dora Bryan as Rose

George Woodbridge as Police Sergeant