Night of the Bloody Apes

Mexican horror in the canon has been all silver masks and gothic cobwebs, so here is the other tradition, the one that actually bleeds. A surgeon transplants a gorilla's heart into his dying son, produces a rampaging ape-man, and somewhere alongside it a masked luchadora works a subplot with almost no bearing on anything. René Cardona splices in genuine open-heart surgery footage for texture, which is as tasteless as it sounds and entirely of a piece with the rest.

It is a gorier remake of Cardona's own tamer wrestling picture, dialled up until distributors abroad could sell it as a shocker.