I remember coming across this story in high school in my textbook and reading it in the middle of class one day when I was bored of the lecture. Its move into darkness, and weirdness, was totally unexpected, and it's always stuck with me. Frank and Eleanor Perry's adaptation maintains and expands those qualities, using sunlight and water and upper class banality to coax along the strange, sinister narrative. Burt Lancaster is excellent in the lead role, combining rich white guy bravado with subtle layers of vulnerability. A film that will stick with me as much as the source material, for sure.