 Edward G. RobinsonFederal Agent Wilson | Federal Agent Wilson |
 Loretta YoungMary Longstreet | Mary Longstreet |
 Orson WellesProf. Charles Rankin | Prof. Charles Rankin |
 Philip MerivaleJudge Adam Longstreet | Judge Adam Longstreet |
 Richard LongNoah Longstreet | Noah Longstreet |
 Konstantin ShayneKonrad Meinike | Konrad Meinike |
 Byron KeithDr. Jeffrey Lawrence | Dr. Jeffrey Lawrence |
 Billy HouseMr. Solomon Potter | Mr. Solomon Potter |
 Martha WentworthSara | Sara |
 David BondStudent (uncredited) | Student (uncredited) |
 John BrownPassport Photographer (uncredited) | Passport Photographer (uncredited) |
| NNeal DoddMinister (uncredited) | Minister (uncredited) |
| NNancy EvansUndetermined Role (uncredited) | Undetermined Role (uncredited) |
 Adolph FaylauerWar Crimes Commision Member (uncredited) | War Crimes Commision Member (uncredited) |
| FFred GodoyUndetermined Role (uncredited) | Undetermined Role (uncredited) |
 Theodore GottliebFairbright (uncredited) | Fairbright (uncredited) |
| JJoseph GranbyUndetermined Role (uncredited) | Undetermined Role (uncredited) |
 Ethan LaidlawTodd, Customer in Potter's Store (uncredited) | Todd, Customer in Potter's Store (uncredited) |
 Ruth LeeUndetermined Role (uncredited) | Undetermined Role (uncredited) |
 Lillian MolieriUndetermined Role (uncredited) | Undetermined Role (uncredited) |
| IIsabel O'MadiganMrs. Lawrence (uncredited) | Mrs. Lawrence (uncredited) |
| GGabriel PeraltaUndetermined Role (uncredited) | Undetermined Role (uncredited) |
| GGerald PierceKid Throwing Newspaper Shreds (uncredited) | Kid Throwing Newspaper Shreds (uncredited) |
| RRobert RaisonUndetermined Role (uncredited) | Undetermined Role (uncredited) |
 Rebel RandallUndetermined Role (uncredited) | Undetermined Role (uncredited) |
 Johnny SandsJogging Student in Woods (uncredited) | Jogging Student in Woods (uncredited) |
 Erskine SanfordParty Guest (uncredited) | Party Guest (uncredited) |
 Pietro SossoMr. Peabody (uncredited) | Mr. Peabody (uncredited) |
| JJosephine VictorUndetermined Role (uncredited) | Undetermined Role (uncredited) |
