This movie stars Susan Foster and Boris Karloff. Karloff plays a mad doctor is is insane with jealousy over a young opera singer (Foster). His love for her may drive him to murder! This was a great movie! This was meant to be a sequel to The Phantom Of the Opera, but they weren’t able to make it, so they changed the plot, but still kept Susan Foster in it (she was Christine in The Phantom of the Opera). I give this movie a A++!!

Boris Karloff