"Secrets of a doctor as told by a doctor!"
Andrew Manson, a young, idealistic, newly qualified Scottish doctor arrives in Wales takes his first job in a mining town, and begins to wonder at the persistent cough many of the miners have. When his attempts to prove its cause are thwarted, he moves to London. His new practice does badly. But when a friend shows him how to make a lucrative practice from rich hypochondriacs, it will take a great shock to show him what the truth of being a doctor really is.
Dr. Andrew Manson

Christine Manson

Dr. Philip Denny

Dr. Frederick Lawford

Owen

Toppy LeRoy

Ben Chenkin

Mrs. Orlando

Dr. Charles Every

Mrs. Thornton

Joe Morgan

Lady Raebank

Mr. Boon

Nurse Sharp
Mr. Stillman
Mrs. Page
Doctor Page

Dr. A.H. Llewellyn

Man Who Buys Microscope (uncredited)

Husband Whose Wife Has Typhoid (uncredited)

Mr. Wickes (uncredited)
Nurse Assisting at Childbirth (uncredited)

Jack the Pharmacist (uncredited)

District Nurse (uncredited)
Tom Evans (uncredited)

Medical Aid Society Committee Member (uncredited)

Girl (uncredited)

Doctor (uncredited)

Miner (uncredited)

Evan Lewis (uncredited)
Old Thomas (uncredited)