- Technology Marches On: Among the families of the boys, only one has a telephone in their home. That's why he has to stay home, as their communication center.
- Write What You Know: Believe it or not, but as a boy, Kästner helped catch a con woman who had stolen money from his mother. Erich Kästner's mother also worked as a hairdresser, like Emil's.
Trivia / Emil and the Detectives