Peter Frankenstein was the young son of of Wolf and Elsa Frankenstein. Accompanying his parents to the town of Frankenstein, Peter began to receive nightly visits from a "friendly giant," who turned out to be none other than the Frankenstein Monster. Despite his apparent friendship with the Monster, Peter's life was nonetheless put into danger when his father shot and seemingly killed Ygor. The Monster, enraged at the death of his friend, attempted to get revenge on Wolf by throwing Peter into the sulphur pits that existed beneath Wolf's laboratory. Luckily, Peter was saved thanks to the timely intervention of Inspector Krogh.