The Ghost of Frankenstein (1942)

The villagers finally decide to free themselves of the Frankenstein menace and blow up Castle Frankenstein, but this succeeds in reviving the monster. Ygor takes the monster to the village of Vasaria to find Frankenstein’s second son Ludwig who works as a psychiatrist. Ygor blackmails Ludwig with the threat of revealing family secrets into helping with the monster. Inspired by a vision of his father’s ghost, Ludwig decides he can cure the creature by replacing its criminal brain with a normal one. As Frankenstein prepares to transplant the brain of a colleague killed by the monster, Ygor persuades Frankenstein’s assistant into transplanting his brain instead so that he might escape his crippled body.