L'assassin habite au… 21
- Aasta: 1942
- Riik: France
- Žanr: Comedy, Mystery, Thriller
- Stuudio: Continental Films
- Märksõna: paris, france, based on novel or book, serial killer, boarding house, french noir, police inspector
- Direktor: Henri-Georges Clouzot
- Osades: Pierre Fresnay, Suzy Delair, Jean Tissier, Pierre Larquey, Noël Roquevert, René Génin