François, a journalist, is approached on the train home by pretty a blonde. She leaves at the same station as him and follows him until he ends up inviting her to his house.
| Actor | Role |
|---|---|
 Marie-France BoyerBarbara/Sylvie | Barbara/Sylvie |
 Pierre VaneckFrançois | François |
 Pierre MassimiL'homme aux lunettes noires | L'homme aux lunettes noires |
 Colette CastelSimone | Simone |
 Philippe OgouzPaul | Paul |
| JJacques MaireLe troisième homme | Le troisième homme |
 Florence BrièreLa vieille voisine | La vieille voisine |
 Gérard CroceLe chef de gare | Le chef de gare |
| HHenri SternLe couturier | Le couturier |
| FFrançois SeverinoNot listed | Not listed |
 Jean-François GobbiNot listed | Not listed |
| JJean LucianiNot listed | Not listed |
| PPatrick JamainNot listed | Not listed |
| NNicole SonnevilleNot listed | Not listed |
 Madeleine MarionNot listed | Not listed |