Henry Stephenson stars as a retired Scotland Yard detective. He is regarded as an icon because he has written volumes of books on the art of detection. While Stephenson is being honoured for his past successes, he senses modern detectives, particularly the current District Attorney, look at him and his methods as outdated. This spurs the old man out of retirement to prove himself to the know-it-all modern detectives.
Henry Stephenson
as Sir Humphrey Quilp
Lloyd Corrigan
as Anatol Duprez
Joseph Allen
as Eddie Regan
Dorothy Lovett
as Jane Mason
Edmund MacDonald
as Assistant District Attorney Knox
Alice Fleming
as Miss Mason
Tom Stevenson
as Robert Berwick
Frederick Worlock
as Patrick Berwick
Jane Weeks
as Miss Woolcott
