Trans-Europ-Express
On the train from Paris to Antwerp, a director and his team hash out the plot of a crime movie. Their story is enacted by Jean Louis-Trintignant (Amour), who plays Elias, a cocaine smuggler seduced by a mysterious woman. But as the director keeps changing the story, Elias is lost in a labyrinth.
Starring Jean-Louis Trintignant, Marie-France Pisier, Christian Barbier, Charles Millot, Daniel Emilfork, Henri Lambert, Alain Robbe-Grillet, Catherine Robbe-Grillet, Virginie Vignon, Gérard Palaprat
Watch "Trans-Europ-Express" on Filmstriben released in 1966. It's a thriller movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.