The Uncertainty Principle (2002)
  
 Sobre o filme
 António and José have been together since early childhood and have shared every type of experience. Although they are on close terms, they belong to two very different worlds. António is rich, from a traditional family. José is the son of a maid who watches over all of their steps with a protective eye. They grow up and, in adulthood, love intrigues are, more and more, to render them accomplices. António marries Camila with whom José has always been in love, with dangerous Vanessa, José?s partner in shady businesses, for a mistress. To further complicate the relationship, one character is missing: the Devil, with whom all will have to dialog. Based on the novel Jóia de Família, by Agustina Bessa-Luís. Shown at the 26th Mostra.
 Título original: O Princípio Da Incerteza
 Ano: 2002
  Duração: 132 minutos
  País: Portugal
  Cor: Colorido
 Direção: Manoel de Oliveira
     Roteiro: Manoel de Oliveira
 Fotografia: Renato Berta
  Elenco: Leonor Baldaque, Leonor Silveira, Isabel Ruth, Ricardo Trepa, Ivo Canelas, Luís Miguel Cintra, José Manuel Mendes, Carmen Santos, Cecília Guimarães, Diogo Dória, Duarte de Almeida 
 Produtor: Paulo Branco