 William PowellDavid Talbot aka Jean Pelletier | David Talbot aka Jean Pelletier |
 Hedy LamarrLucienne Talbot | Lucienne Talbot |
 Claire TrevorMichelle Allaine | Michelle Allaine |
 Basil RathboneHenri Sarrou | Henri Sarrou |
 Margaret WycherlyMadame Pelletier | Madame Pelletier |
 Felix BressartDr. Andre Tessier | Dr. Andre Tessier |
 Sig RumanDr. Alex Dubroc | Dr. Alex Dubroc |
 H.B. WarnerProsecuting Attorney | Prosecuting Attorney |
 Philip MerivaleCommissaire | Commissaire |
 Enrique AcostaAssociate Judge (uncredited) | Associate Judge (uncredited) |
 Francis X. Bushman Jr.Giant Policeman (uncredited) | Giant Policeman (uncredited) |
 Frank ConroyDefense Attorney (uncredited) | Defense Attorney (uncredited) |
 Gibson GowlandReporter (uncredited) | Reporter (uncredited) |
 Fritz LeiberForeign Minister Deval (uncredited) | Foreign Minister Deval (uncredited) |
 Eric MayneCourtroom Spectator (uncredited) | Courtroom Spectator (uncredited) |
 Anna Q. NilssonMadame Deval (uncredited) | Madame Deval (uncredited) |
 John St. PolisProfessor (uncredited) | Professor (uncredited) |
 Vladimir SokoloffCarlos Le Duc (uncredited) | Carlos Le Duc (uncredited) |
 Torben MeyerOld Man (uncredited) | Old Man (uncredited) |
