Europe has a common currency but also shares popular TV formats. Some formats though do not travel and it is on these including Belgium's 'Blokken' that the Guardian reports:
"There are still some idiosyncratic Euro-progs that stand apart from the cookie-cutter crowd - shows that irresistibly chime with the national psyche. In Belgium, the most popular gameshow is the bizarre, Dutch-language Blokken, an unnatural splicing of general-knowledge quiz and competitive Tetris-playing. Belgians must love manipulating falling blocks into ordered lines: the quiz has run for over 4,500 episodes."