Working in Dr. Cranley's laboratory, scientist Jack Griffin was always given the latitude to conduct some of his own experiments. His sudden departure, however, has Cranley's daughter Flora worried about him. Griffin has taken a room at the nearby Lion's Head Inn, hoping to reverse an experiment he conducted on himself that made him invisible. But the experimental drug has also warped his mind, making him aggressive and dangerous. He's prepared to do whatever it takes to restore his appearance.
Claude Rains
as Dr. Jack Griffin
Gloria Stuart
as Flora Cranley
William Harrigan
as Dr. Arthur Kemp
Henry Travers
as Dr. Cranley
Una O'Connor
as Jenny Hall
Forrester Harvey
as Herbert Hall
Holmes Herbert
as Chief of Police
E. E. Clive
as Constable Jaffers
Dudley Digges
as Chief Detective
Harry Stubbs
as Inspector Bird
Donald Stuart
as Inspector Lane
Merle Tottenham
as Millie
