Writing Credits (in alphabetical order)
| John Nesbitt | ||
Cast (in credits order)
| John Nesbitt | ... | Narrator (voice) | |
| Rest of cast listed alphabetically: | |||
| Matthew Boulton | ... | Dr. Jenner (clip from 'The Story of Dr. Jenner') (archive footage) (uncredited) | |
| Stephen McNally | ... | Dr. Christian Eijkman (clip from 'The Magic Alphabet') (archive footage) (uncredited) | |
| Shepperd Strudwick | ... | Dr. Semmelweis (clip from: 'That Mothers Might Live') / Dr. Joseph Goldberger (clip from 'A Way in the Wilderness') (archive footage) (uncredited) | |
| Chill Wills | ... | Tom Davenport (clip from 'The Immortal Blacksmith') (archive footage) (uncredited) | |
Produced by
| John Nesbitt | ... | producer |
Music by
| Robert Franklyn | ... | (uncredited) |
| David Snell | ... | (uncredited) |
Editing by
| Newell P. Kimlin | ||
Music Department
| David Snell | ... | musical director |
| Wally Heglin | ... | orchestrator (uncredited) |
