After experimenting on himself and becoming invisible, scientist Jack Griffin, now aggressive due to the drug's effects, seeks a way to reverse the experiment at any cost.
Dr. Jack Griffin
Flora Cranley
Dr. Arthur Kemp
Dr. Cranley
Jenny Hall
Herbert Hall
Chief of Police
Constable Jaffers
Chief Detective
Inspector Bird
Inspector Lane
Millie
Detective Thompson (uncredited)
Radio Announcer (uncredited)
Villager Playing Darts (uncredited)
Bicycle Owner (uncredited)
Farmer (uncredited)
Mary Purdy (uncredited)
Townswoman at Pub (uncredited)
Informer Suggesting Ink (uncredited)
Villager (uncredited)
Officer in Charge of Barn Capture (uncredited)
Reporter (uncredited)
Screaming Woman (uncredited)
