AllMovie

A man who was the lone survivor of a shipwreck is rescued, only to discover that he's in greater danger than ever before in this horror story inspired by H.G. Wells' The Island of Dr. Moreau. After his ship sinks in the midst of an ocean crossing, William Fitzgerald (Richard Derr) is near death when he finds his way to a remote island off the shore of Peru. Fitzgerald is discovered and given shelter by Dr. Girard (Francis Lederer), a scientist who has set up a lab on the island with his wife Frances (Greta Thyssen). It seems that most of the natives have fled the island in fear of what Girard is doing, and Fitzgerald soon discovers why -- the doctor has unusual theories about the links between humans and animals, and he has performed bizarre experiments on a panther that has transformed the feline into a man. The creature has gotten loose from Girard and now prowls the island with a thirst for blood; Fitzgerald's danger is only increased when he discovers that Frances has fallen in love with him. Terror Is a Man was also distributed under the titles Blood Creature, Creature from Blood Island, and The Gory Creatures.