The Source of All Evil is a fictional character on the WB television series Charmed, a demon who is the ruler of the underworld for the show's first 4 seasons. He is portrayed by Michael Bailey Smith, Bennet Guillory and Peter Woodward over the course of the series and had a brief resurrection in one episode during the show's eighth season.He was responsible for incarcerating the powerful demon Zankou and The Tall Man.