If you loved Soylent Green, try The Boston Strangler
A bridge between a film you've already seen and one most people haven't. The Boston Strangler has roughly 5.6× fewer votes than Soylent Green — it's a deeper cut, not a mainstream recommendation. 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 Richard Fleischer, and they both carry the dread, paranoid mood tags, and they sit in Crime / Thriller territory. If that's the register that drew you to Soylent Green, the second film will land in a comparable space — through a different lens.
What The Boston Strangler is
Boston, summer humidity thick as tar. Bra straps snipped on fire escapes. Detectives follow threads of wigs, parking tickets, and a single bloody palm print. The killer remains a shadow until the last reels. Richard Fleischer’s procedural stays squarely behind blue shields.

