The owner of a coal mining operation, falsely imprisoned for fratricide, takes a drug to make him invisible, despite its side effect: gradual madness.
Director: Joe May
Cast:Cedric Hardwicke , Vincent Price , Nan Grey , John Sutton , Cecil Kellaway , Alan Napier , Forrester Harvey , Ernie Adams , Jimmy Aubrey , Walter Bacon , Billy Bevan , Clara Blore , Stanley Blystone , Matthew Boulton , Ed Brady , Chet Brandenburg , Louise Brien , Charles Brokaw