Spencer Tracy (Henry M. Stanley), Nancy Kelly (Eve Kingsleyová), Richard Greene (Gareth Tyce), Walter Brennan (Jeff Slocum), Charles Coburn (Lord Tyce), Cedric Hardwicke (Dr. David Livingstone), Henry Hull (James Gordon Bennett Jr), Henry Travers (John Kingsley), Miles Mander (Sir John Gresham), David Torrence (Mr. Cranston), Holmes Herbert (Frederick Holcomb), C. Montague Shaw (Sir Oliver French), Brandon Hurst (Sir Henry Forrester), Paul Harvey (plukovník Grimes), Russell Hicks (komisař), Frank Dae (komisař), Emmett Smith |