Edward G. Robinson Federal Agent Wilson Loretta Young Mary Longstreet Orson Welles Prof. Charles Rankin Philip Merivale Judge Adam Longstreet Richard Long Noah Longstreet Konstantin Shayne Konrad Meinike Byron Keith Dr. Jeffrey Lawrence Billy House Mr. Solomon Potter Martha Wentworth Sara David Bond Student (uncredited) John Brown Passport Photographer (uncredited) Neal Dodd Minister (uncredited) Nancy Evans Undetermined Role (uncredited) Adolph Faylauer War Crimes Commision Member (uncredited) Fred Godoy Undetermined Role (uncredited) Theodore Gottlieb Fairbright (uncredited) Joseph Granby Undetermined Role (uncredited) Ethan Laidlaw Todd, Customer in Potter's Store (uncredited) Ruth Lee Undetermined Role (uncredited) Lillian Molieri Undetermined Role (uncredited) Orson Welles Director Russell Metty Director Jack Voglin Director