Gregoire's Metro ride is shot at two different stations. The platform scene was filmed on line 10 on the south platform of Mirabeau station, recognizable by the different angles of the tracks. The train interior is shot at Portes des Lilas station, which serves lines 3bis and 11. If you look out the window on the right edge of the screen to what should be the north wall, you can see the Portes des Lilas sign, as well as the curved frames used to hold advertisements. Mirabeau station does not have frames on the north wall.