 | John Nesbitt als Narrator (voice) |
 | Matthew Boulton als Dr. Edward Jenner (uncredited) |
 | Helen Brown als Mary Phipps (uncredited) |
 | Harry Cording als Village Dairyman (uncredited) |
 | Fay Helm als Mrs. Edward Jenner (uncredited) |
 | Raymond Severn als Little Jim Phipps (uncredited) |
 | William Tannen als Sarah's Sweetheart (uncredited) |
| Henry K. Dunn | Director |
| John Nesbitt | Producer |
| Jackson Rose | Director of Photography |
| Mildred Rich | Editor |
| Leonid Raab | Orchestrator |
| Herman Boxer | Screenplay |
| David Snell | Original Music Composer |
