If you loved Murder by Decree, try Black Christmas
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Bob Clark, and they both carry the dread mood tag, and they sit in Crime / Mystery territory. If that's the register that drew you to Murder by Decree, the second film will land in a comparable space — through a different lens.
dread
What Black Christmas is
Holiday halls decked, holly wreaths nailed crooked. A phone rings obscenities into empty rooms. Winter waits, breath visible.

