M.C. Escher is among the most intriguing of artists. In 1956 he challenged the laws of perspective with his graphic Print Gallery and his uncompleted master-piece quickly became the most puzzling enigma of modern art. Fifty years later, can mathematician Hendrik Lenstra complete it? Should he?

Documentary

Denys Arcand, Joost Batenburg, François Bergeron, Hendrik Lenstra, M. C. Escher