Apt Pupil (1998)

The darkest film here, and the one to skip if you want comfort. Bryan Singer adapts another Different Seasons novella: a teenager, Brad Renfro, discovers that his elderly neighbor is a Nazi war criminal in hiding and blackmails him into describing the camps instead of turning him in. What makes it worth your time is Ian McKellen, whose Dussander shifts from frail old man to something far colder as the boy's curiosity curdles. Singer called it a study in cruelty, and it was a critical and commercial disappointment in 1998, so come for a tense two-hander about how evil is passed on, not for a crowd-pleaser.