On screen
Cast
9 credited performers
Edward Underdown
Detective Inspector Viner
Maxwell Reed
The Dark Man
Natasha Parry
Molly
William Hartnell
Superintendent of Police
Barbara Murray
Carol Burns
Artwork unavailable
Robert Long
Charles Burns
Cyril Smith
Samuel Denny
Artwork unavailable
Leonard White
Detective Sergeant Evans
Artwork unavailable
Ernest Haines
Mostyn