* RealLifeWritesThePlot: The scenes in which Daniel tries to teach an unruly class were shot at the school which Fatih Akin attended as a teenager.
** When Daniel and Juli are traveling through Romania, only [[PhotoMontage photos are shown]] instead of real film footage. The reason for that is the Romanian government didn't give permission to film in their country, so they had to take photos instead.
** Originally, Daniel and Juli were supposed to sing The Cure's "Friday I'm In Love", but the rights were too expensive. When the music supervisor was able to secure the rights for "Blue Moon" instead, the script was changed at the last minute to include a conversation on oldies.
* WhatCouldHaveBeen: The scene between Daniel and Luna was supposed to be more erotic, but actress Branka Katić felt uncomfortable about performing in the nude, which is why instead the scene has the surreal effect of Luna becoming Daniel's puppeteer.