Cast
Robert Donat
Dr. Andrew Manson
Penelope Dudley-Ward
Toppy LeRoy
Edward Chapman
Joe Morgan
Basil Gill
Doctor Page
Joss Ambler
Dr. A.H. Llewellyn
Joan Kemp-Welch
Nurse Assisting at Childbirth (uncredited)
Francis L. Sullivan
Ben Chenkin
Mary Clare
Mrs. Orlando
Rosalind Russell
Christine Manson
Kynaston Reeves
Doctor (uncredited)
Ralph Richardson
Dr. Philip Denny
Cecil Parker
Dr. Charles Every
Nora Swinburne
Mrs. Thornton
Bryan Herbert
Husband Whose Wife Has Typhoid (uncredited)
Rex Harrison
Dr. Frederick Lawford
Felix Aylmer
Mr. Boon
Cameron Hall
Man Who Buys Microscope (uncredited)
Gus McNaughton
Tom Evans (uncredited)
Leslie Phillips
Girl (uncredited)
Emlyn Williams
Owen
Harry Terry
Miner (uncredited)
Percy Parsons
Mr. Stillman
Athene Seyler
Lady Raebank
Eliot Makeham
Jack the Pharmacist (uncredited)
Bernard Miles
Medical Aid Society Committee Member (uncredited)