A bunch of hopeful heirs to the estate of a reclusive but wealthy scientist arrives on an isolated island to hear the will. The sinister housekeeper, Lupe (well played by Shelley Morrison) turns out to be in cahoots with the horribly scarred scientist. But there is a murderous, equally horribly scarred zombie robot the scientist has made in his own image that threatens and / or starts killing some of the assembled heirs. It becomes a race against time for the survivors to uncover the person responsible for the scientist's disfigurement, to call off the rampages of the robot. The story has some nice touches but the soap opera dialog and unpleasant characters keep Castle of Evil in constant low gear. It is good to see the underrated Lisa Gaye but her character is so dull. Hugh Marlowe and Scott Brady are well cast, and Brady provides a tongue in cheek attitude when he keeps referring Lupe as 'Loopy.' Virginia Mayo is terrible, and she seems to know it... The zombie is menacing, however. As played by William Thourlby, the zombie scientist only has to cock his head slightly to be frightening. (Thourlby was the star of the lamentable Z-movie, The Creeping Terror.) Paul Dunlap's music is not boring and kept waking me up. The secluded castle has many unusual features, including an elaborate electronics and surveillance system.