Question: What series created by Trey Parker and Matt Stone has an episode where a character murders another characters parents and feeds them to him?

Context paragraphs:
Eric Cartman: Eric Theodore Cartman, often referred to as just Cartman, is a main character in the animated television series "South Park", created by Matt Stone and Trey Parker, and voiced by Trey Parker.  Cartman, generally referred to by his surname, is one of four central characters in "South Park", along with his friends Stan Marsh, Kyle Broflovski, and Kenny McCormick.  Cartman first appeared, originally named Kenny, in prototypical form in a 1992 animated short "Jesus vs. Frosty", and a 1995 animated short "Jesus vs. Santa", and first appeared on television in the pilot episode of "South Park", "Cartman Gets an Anal Probe", on August 13, 1997.

South Park (season 2): Season two of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on April 1, 1998.  The second season concluded after 18 episodes on January 20, 1999; it remains the longest season of "South Park" to date.  While most of the episodes were directed by series creator Trey Parker, Season 2 includes two episodes directed by Eric Stough.

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.  The ninth season concluded after 14 episodes on December 7, 2005.  All of the episodes in the ninth season were written and directed by Trey Parker.

Scott Tenorman Must Die: "Scott Tenorman Must Die" is the fourth episode of the fifth season of the American animated television series "South Park", and the 69th episode of the series overall.  It first aired on Comedy Central in the United States on July 11, 2001.  In the episode, ninth-grader Scott Tenorman makes Cartman believe that buying pubic hair from him will make Cartman reach puberty.  Realizing that he had been tricked, an angry Cartman murders Scott's parents and feeds them to him.

South Park (season 7): Season seven of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 19, 2003.  The seventh season concluded after 15 episodes on December 17, 2003, and was written and directed by Trey Parker.

South Park (season 8): Season eight of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 17, 2004.  The eighth season concluded after 14 episodes on December 15, 2004, and was written and directed by Trey Parker.  The season deals with various topics that were relevant at the time of release.  The episodes portray a spectrum of topics, from effect of large scale retails corporations to immigration.

Chickenpox (South Park): "Chickenpox" is the tenth episode in the second season of the American animated television series "South Park".  The 23rd episode of the series overall, it originally aired on Comedy Central in the United States on August 26, 1998.  The episode was written by series co-creators Trey Parker and Matt Stone, along with Trisha Nixon, and directed by Parker.  In the episode, the parents of South Park intentionally expose their children to the chickenpox disease.

South Park (season 10): The tenth season of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 22, 2006.  The tenth season concluded after 14 episodes on November 15, 2006.  This is the first season in which Kenny does not die and the last season featuring Isaac Hayes (the voice of Chef) as Hayes quit the show following the backlash behind season nine's "Trapped in the Closet" episode.  This season also had a minor controversy when the Halloween episode "Hell on Earth 2006" depicted "The Crocodile Hunter's" Steve Irwin with a stingray lodged in his chest getting thrown out of Satan's Halloween party for not being in costume.  Episode 2 in this season is the last one with the Braniff Airlines logo.  All the episodes in this season were written and directed by Trey Parker.

Gnomes (South Park): "Gnomes" is the seventeenth episode in the second season of the American animated television series "South Park".  The 30th episode of the series overall, it originally aired on Comedy Central in the United States on December 16, 1998.  The episode was written by series co-creators Trey Parker and Matt Stone, along with Pam Brady, and directed by Parker.  This episode marks the first appearance of Tweek Tweak and his parents.

South Park (season 5): Season five of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on June 20, 2001.  The fifth season concluded after 14 episodes on December 12, 2001.  The 14-episode season length would become a standard for later years of the series (up until the seventeenth season).

Supporting paragraphs: Scott Tenorman Must Die South Park (season 5)
Answer: South Park