Who created the animated television series that has "The Death of Eric Cartman" as the sixth episode? 
The Death of Eric Cartman: "The Death of Eric Cartman" is the sixth episode in the ninth season of the American animated television series "South Park". South Park (season 9): Season nine of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 9, 2005.
Trey Parker and Matt Stone