Overview
The owner of a coal mining operation, falsely imprisoned for fratricide, takes a drug to make him invisible, despite its side effect: gradual madness.
Cast
- Cedric Hardwicke as Richard Cobb
- Vincent Price as Geoffrey Radcliffe
- Nan Grey as Helen Manson
- John Sutton as Dr. Frank Griffin
- Cecil Kellaway as Inspector Sampson
- Alan Napier as Willie Spears
- Forrester Harvey as Ben Jenkins
- Ernie Adams as Minor Role (uncredited)
- Jimmy Aubrey as Plainclothesman (uncredited)
- Walter Bacon as Fight Spectator (uncredited)