Troubled scientist Dr. Emmanuel Hildern (Peter Cushing) has acquired a scary-looking ancient skeleton that houses what seems to be the essence of pure evil itself. Emmanuel is haunted by memories of his former wife (Jenny Runacre), who went insane, and has taken out his paranoia on his beautiful young daughter Penelope (Lorna Heilbron), who's more or less kept prisoner in their home and is the unwitting guinea pig in her mad father's experiments. Meanwhile, his conniving brother (Christopher Lee), a scientific rival, plots to steal the skeleton, which can generate its flesh with a touch of water. Also figuring into this is an insane asylum (which is run by Lee's character), a bald psycho (Kenneth J. Warren) terrorizing the city, a rowdy local tavern, flashbacks, gothic atmospherics and a slimy regenerated creature! With the killer cast (the four I mentioned above all giving excellent performances), engaging, intelligent and original storyline, good production values/period detail and some surprisingly grisly effects, you'll find yourself highly entertained, and it's beautifully shot and scored as well. One of the best features made by Tigon and on par with most of the best films produced at rival studios Hammer and Amicus. Also in the cast are George Benson, Duncan Lamont as a police inspector, Michael Ripper, Catherine Finn and Marianne Stone.