Edward G. Robinson as Federal Agent Wilson

Loretta Young as Mary Longstreet

Orson Welles as Prof. Charles Rankin

Philip Merivale as Judge Adam Longstreet

Richard Long as Noah Longstreet

Konstantin Shayne as Konrad Meinike

Byron Keith as Dr. Jeffrey Lawrence

Billy House as Mr. Solomon Potter

Martha Wentworth as Sara

David Bond as Student (uncredited)

John Brown as Passport Photographer (uncredited)

Neal Dodd as Minister (uncredited)

Nancy Evans as Undetermined Role (uncredited)

Adolph Faylauer as War Crimes Commision Member (uncredited)

Fred Godoy as Undetermined Role (uncredited)

Theodore Gottlieb as Fairbright (uncredited)

Joseph Granby as Undetermined Role (uncredited)

Ethan Laidlaw as Todd, Customer in Potter's Store (uncredited)

Ruth Lee as Undetermined Role (uncredited)

Lillian Molieri as Undetermined Role (uncredited)

Isabel O'Madigan as Mrs. Lawrence (uncredited)

Gabriel Peralta as Undetermined Role (uncredited)

Gerald Pierce as Kid Throwing Newspaper Shreds (uncredited)

Robert Raison as Undetermined Role (uncredited)

Rebel Randall as Undetermined Role (uncredited)

Johnny Sands as Jogging Student in Woods (uncredited)

Erskine Sanford as Party Guest (uncredited)

Pietro Sosso as Mr. Peabody (uncredited)

Josephine Victor as Undetermined Role (uncredited)