Question: "Cartman's Mom Is a Dirty Slut" is the first season finale of the American animated television series "South Park", it is part one of a two-episode story arc, which concluded with "Cartman's Mom Is Still a Dirty Slut", the episode concludes the storyline of the season one finale "Cartman's Mom Is a Dirty Slut"; who is suddenly shot, just as he is about to reveal the identity of Cartman's father?
Answer: Mephesto