The essay below is drawn from an article I published in 2019 called “The Shock of Aging (Women) in Horror Film.” I’m excerpting (and adapting) part of the article here because the film it’s about, a very much undervalued film by Edward Dein from 1960 called The Leech Woman,[i] is not only a brilliant film but uncannily anticipates Coralie Fargeat’s equally brilliant film, The Substance (2024). You can see the outlines of The Substance in The Leech Woman, both in its structure and its preoccupations – and I’m surprised that more people aren’t talking about this earlier film. If this essay does nothing else, then, I hope it sends more people to The Leech Woman. But, more specifically, I think the arguments I make about The Leech Woman here are really relevant to The Substance.