William Powell

Character: David Talbot aka Jean Pelletier

Hedy Lamarr

Character: Lucienne Talbot

Claire Trevor

Character: Michelle Allaine

Basil Rathbone

Character: Henri Sarrou

Margaret Wycherly

Character: Madame Pelletier

Felix Bressart

Character: Dr. Andre Tessier

Sig Ruman

Character: Dr. Alex Dubroc

H.B. Warner

Character: Prosecuting Attorney

Philip Merivale

Character: Commissaire

Enrique Acosta

Character: Associate Judge (uncredited)

Francis X. Bushman Jr.

Character: Giant Policeman (uncredited)

Frank Conroy

Character: Defense Attorney (uncredited)

Gibson Gowland

Character: Reporter (uncredited)

Fritz Leiber

Character: Foreign Minister Deval (uncredited)

Eric Mayne

Character: Courtroom Spectator (uncredited)

Anna Q. Nilsson

Character: Madame Deval (uncredited)

John St. Polis

Character: Professor (uncredited)

Vladimir Sokoloff

Character: Carlos Le Duc (uncredited)

Torben Meyer

Character: Old Man (uncredited)