Darsteller und CrewLeonid RaabOrchesterdirigent:inFay HelmMrs. Edward Jenner (uncredited)Jackson RoseKameramann/frauJohn NesbittNarrator (voice)William TannenSarah's Sweetheart (uncredited)Helen BrownMary Phipps (uncredited)Matthew BoultonDr. Edward Jenner (uncredited)Harry CordingVillage Dairyman (uncredited)Herman BoxerDrehbuchDavid SnellKomponist:in der Originalmusik