Casque d'or is one of the greatest films about passion I have ever seen. The intensity of the feeling between Simone Signoret and Serge Reggiani, particularly the former, is overwhelming. These people are outsiders from the very beginning, being part of the criminal underworld from which they will never escape. The honest, bourgeois world is permanently closed to them. Children in French secondary school write essays about this film as if it were a classic French novel. It certainly is a classic, and it could not have been made in any country other than France.