michael gambon played voldemort in six harry potter films
gambon has played the eponymous mystery writer protagonist in the bbc television serial the singing detective  jules maigret in the 1990s itv serial maigret  and professor albus dumbledore in the final six harry potter films after the death of previous actor richard harris
professor albus percival wulfric brian dumbledore is a fictional character in j k rowling s harry potter series