Related Clues:
- Bit of help
- Fingerprints, e.g.
- Holmes quest
- Criminal game?
- Sleuth's aid
- Sleuthing aid
- Footprint or loose thread, perhaps
- Miss Scarlet's game
- This answer intersects it
- First clue
- Detective's quest
- Colonel Mustard game
- 1985 movie with three different endings
- Board game that became a movie
- Investigation aid