De Cock and Vledder investigate the robbery of an armored truck which leads to several murders.

A lift technician finds himself drawn into a web of mystery and peril as he investigates the perplexing deadly accidents occurring in the elevators of a new office building.

Psychological thriller. Geography teacher smuggles a case of heroin for a friend.

Gekkenbriefje (Alternatively: Crazy Going) is a 1981 Dutch film directed by Olga Madsen. It is based upon the book "Zorg dat je een gekkenbriefje krijgt" by Ger Verrips. It was the first movie that Olga Madsen directed. The film is about a Dutch soldier who does not agree with the Dutch politics surrounding the Indonesian War of Independence.