A semi-sequel to the 1933 Universal horror masterwork The Invisible Man, The Invisible Man Returns stars Vincent Price in the title role. Condemned for a murder he did not commit, Price begs doctor John Sutton to inject him with the invisibility serum invented by Claude Rains in the first film. Sutton does so, even though he warns Price that the serum will very likely drive him insane. Sir Cedric Hardwicke co-stars as the genuine murderer, a colliery owner who framed Price. Though his behavior veers dangerously close to homicidal, Price is able to mete out retribution to Hardwicke without stooping to murder. As he gradually weakens, Price is recaptured and rushed to the hospital, where his life is saved by an emergency blood transfusion. Price's face is revealed to us for the first time as he vows his undying love to leading lady Nan Grey. Taking a less playful approach to the grim goings-on than director James Whale had in The Invisible Man, The Invisible Man Returns is a grim little morality play, containing vestiges of The Count of Monte Cristo and distinguished by an odd preoccupation with the mechanics and minutiae of death (a characteristic trait in the screenplays of Curt Siodmak). The film helped to solidify the cinematic reputation of Vincent Price, though it would be years before he'd specialize in horror on a full-time basis.