Jean-Claude Pascal

William Powell

David Talbot aka Jean Pelletier

Analía Gadé

Hedy Lamarr

Lucienne Talbot

Jaime Avellán

Claire Trevor

Michelle Allaine

Antonio Casas

Carlos Casaravilla

Basil Rathbone

Henri Sarrou

Margaret Wycherly

Madame Pelletier

José María Caffarel

Felix Bressart

Dr. Andre Tessier

Jaime Viade

Sig Ruman

Dr. Alex Dubroc

Roberto Palomo

H.B. Warner

Prosecuting Attorney

Roberto Camardiel

Philip Merivale

Commissaire

Enrique Acosta

Associate Judge (uncredited)

Francis X. Bushman Jr.

Giant Policeman (uncredited)

Frank Conroy

Defense Attorney (uncredited)

Gibson Gowland

Reporter (uncredited)

Fritz Leiber

Foreign Minister Deval (uncredited)

Eric Mayne

Courtroom Spectator (uncredited)

Anna Q. Nilsson

Madame Deval (uncredited)

John St. Polis

Professor (uncredited)

Vladimir Sokoloff

Carlos Le Duc (uncredited)

Torben Meyer

Old Man (uncredited)

Alfonso Balcázar

Director

Jack Conway

Director

Miguel Cussó

Guión

Alfonso Balcázar

Guión

Guy Trosper

Guión Adaptado

Howard Emmett Rogers

Historia

John H. Kafka

Historia

Joseph Ruttenberg

Director de Fotografía

Bronislau Kaper

Compositor de la Música Original

Edwin H. Knopf

Productor

Producciones Balcázar

Compañía de Produccion

Jam Films

Compañía de Produccion

George Boemler

Editor