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.
as Dr. Jack Griffin
as Flora Cranley
as Dr. Arthur Kemp
as Dr. Cranley
as Jenny Hall
as Herbert Hall
as Chief of Police
as Constable Jaffers
as Chief Detective
as Inspector Bird
as Inspector Lane
as Millie
as Detective Thompson (uncredited)
as Radio Announcer (uncredited)
as Villager Playing Darts (uncredited)
as Bicycle Owner (uncredited)
as Farmer (uncredited)
as Mary Purdy (uncredited)
as Townswoman at Pub (uncredited)
as Informer Suggesting Ink (uncredited)
as Villager (uncredited)
as Officer in Charge of Barn Capture (uncredited)
as Reporter (uncredited)
as Screaming Woman (uncredited)
as Townsman at Pub (uncredited)
as Constable (uncredited)
as Townswoman at Pub (uncredited)
as Woman (uncredited)
as Doctor (uncredited)
as Constable (uncredited)
as Constable (uncredited)
as Cop (uncredited)
as Constable (uncredited)
as Party Guest (uncredited)
as Detective Hogan (uncredited)
as Official (uncredited)
as Old Farmer with Barn (uncredited)
as Orphanage Worker (uncredited)
as Old Woman Listening to Radio (uncredited)
as Hospital Doctor (uncredited)
as 2nd Man Calling Police ('Frost')(uncredited)
as Railroad Switchman (uncredited)
