Interpol contre X

Howard Vernon

Inspector Jackson

Maria Vincent

Madeleine

Andrex

Mathias

Junie Astor

Magda

Marcel Pérès

Victor Belloy

Joëlle Bernard

Lucy

Pauline Carton

Louise Belloy

Frédéric O'Brady

Mike

Robert Dalban

Commissioner Meunier

Roland Bailly

Chando

Georges Bever

Morgue keeper

Fernand Rauzéna

Commissioner Masson

Jacques Bourgeois

Ronald Bell

Edgar Duvivier

Paul Grandjean

Robert Lassus

Pierre Moncorbier

Habib Mustapha

Contact in Istanbul

Marcel Duhamel

(uncredited)