John Nesbitt

Narrator (voice)

Matthew Boulton

Dr. Edward Jenner (uncredited)

Helen Brown

Mary Phipps (uncredited)

Harry Cording

Village Dairyman (uncredited)

Fay Helm

Mrs. Edward Jenner (uncredited)

Raymond Severn

Little Jim Phipps (uncredited)

William Tannen

Sarah's Sweetheart (uncredited)

Henry K. Dunn