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