In 1999, Zij Gelooft In Mij was selected as the best film at IDFA and also won the Joris Ivens Award.

In this moving film, Appel tries to find an answer to the question of who in the event of a forgotten death does the moral responsibility lie.

Jos de Putter, Karin Junger, Pieter Fleury and Heddy Honingmann, among others, also contributed to this series.

The documentary De laatste overwinning followed the residents of the Civetta District in Siena as they prepared for the local horse race in Palio.

Inspired by the adventurous but also tragic life of his father, in this documentary John Appel goes on a search for the true nature of the player.