Before there was Netflix and Chill, Ian Brady and Myra Hindley had X-rated Films and Murder. And before you think this could be some sort of Bonnie and Clyde, romanticized musical: This is a story about wanting to "commit the perfect murder," obsession, a touch of Nazism, and body dumping. These are not the moors of a Bronte sisters novel. There are no musical numbers in sight.
It might be a Lifetime movie, though, now that I think about it.