Question: What is the eighteenth season of the American animated sitcom which "The Cissy" is the third episode in 

Context articles: Attack of the Killer App
South Park (season 18)
The Art of the Sucker Punch
Please Homer, Don't Hammer 'Em
Rehash (South Park)
HappyHolograms
Guess Who's Coming to Criticize Dinner?
The Cissy
Treehouse of Horror XXII
Four Regrettings and a Funeral

"Attack of the Killer App" is the third episode of the sixth season of the American animated sitcom "Futurama".
 It originally aired on Comedy Central in the United States on July 1, 2010.
 The episode focuses on the release of the new eyePhone, resulting in Fry posting a viral video of Leela on the Internet.
 Craig Ferguson, host of "The Late Late Show with Craig Ferguson", guest stars as Leela's singing boil, Susan.
The eighteenth season of the American animated sitcom "South Park" premiered on Comedy Central on September 24, 2014 with "Go Fund Yourself", and ended with "#HappyHolograms" on December 10, 2014, with a total of ten episodes.
 The season featured serial elements and recurring story lines, which "The A.V. Club" noted as an experimentation with episode-to-episode continuity, in which the episodes "explore the consequences of the boys' actions [week to week], allowing the plots to be motivated in part by their attempts to dig themselves out of a hole".
"The Art of the Sucker Punch" is the third episode of the first season of the American animated sitcom "Home Movies", and the 3rd episode of the series overall.
 It originally aired on the UPN network on May 10, 1999.
 The episode concerns a confrontation between Brendon Small and local bully Shannon, after Brendon discovers Shannon has been physically harassing his friend Jason.
 Brendon decides to record his preparation for the fight, as well as the fight itself, in order to create a documentary.
"Please Homer, Don't Hammer 'Em" is the third episode "The Simpsons"’ eighteenth season.
 It first aired on the Fox network in the United States on September 24, 2006.
 In this episode, Marge teaches herself carpentry, but uses Homer as a front when she wants to make money off her talents since no one in Springfield believes that women can be carpenters.
 Meanwhile, Principal Skinner and Bart fight each other when Bart discovers that Skinner is allergic to peanuts and Skinner discovers that Bart is allergic to shrimp.
"#REHASH" is the ninth episode in the eighteenth season of the American animated television series "South Park".
 The 256th overall episode, it was written and directed by series co-creator and co-star Trey Parker.
 The episode premiered on Comedy Central in the United States on December 3, 2014.
 The episode is part one of the two-part season finale.
 The episode lampoons the popularity of Internet Let's Play celebrities and the phenomena of Internet trending topics that lack actual relevance.
 The episode also references and intertwined multiple elements from previous episodes in the eighteenth season of "South Park".
 YouTube celebrity PewDiePie plays himself in this episode.
"#HappyHolograms" is the tenth and final episode in the eighteenth season of the American animated television series "South Park".
 The 257th episode overall, it was written and directed by series co-creator and co-star Trey Parker.
 The episode premiered on Comedy Central in the United States on December 10 2014.
 It is the second part of the two-part season finale which began with the previous episode, "#REHASH".
 The episode makes multiple references to earlier episodes over the season, as well as to previous seasons, while mainly lampooning the trend of culture constantly making trending topics with no actual relevance.
 It also lampoons news events such as the death of Eric Garner, the shooting of Michael Brown, the sexual assault allegations against Bill Cosby, and the use of celebrity holograms.
 YouTube celebrity PewDiePie appeared as himself, continuing his story line from the previous episode.
"Guess Who's Coming to Criticize Dinner?"
 is the third episode of the eleventh season of the American animated sitcom "The Simpsons".
 It originally aired on the Fox network in the United States on October 24, 1999.
 In the episode, Homer becomes a food critic for a Springfield newspaper and ends up annoying the restaurant owners of Springfield after he makes negative reviews just to be mean, advice he took from fellow critics.
 Springfield's restaurant owners then attempt to kill Homer by feeding him a poisoned éclair.
 American actor Ed Asner guest starred in the episode as the newspaper editor that hires Homer.
 The episode has received generally mixed reviews from television critics since airing.
"The Cissy" is the third episode in the eighteenth season of the American animated television series "South Park".
 The 250th overall episode, it was written and directed by series co-creator Trey Parker.
 The episode premiered on Comedy Central in the United States on October 8, 2014.
 The episode explores the culture of transgender individuals and gender identity.
"Treehouse of Horror XXII" is the third episode of the twenty-third season and the twenty-second Halloween episode of the American animated sitcom "The Simpsons".
 It originally aired on the Fox network in the United States on October 30, 2011.
 The episode is part of the "Treehouse of Horror" series, which is an episode divided into three separate stories and an opening that is a parody of scary or Halloween themed stories.
 This episode's stories were primarily spoofs of the French film "The Diving Bell and the Butterfly", the television series "Dexter", and the American film "Avatar".
 The opening was a parody of the autobiographical film "127 Hours", in which the subject Aron Ralston loses an arm.
"Four Regrettings and a Funeral" is the third episode of the 25th season of the American animated sitcom "The Simpsons", and the 533rd episode of the series.
 It first aired on the Fox network in the United States on November 3, 2013.
 It was written by Marc Wilmore and directed by Mark Kirkland.
 The episode is dedicated in memory of Marcia Wallace (the voice of Edna Krabappel) who died on October 25, 2013.
 In addition, the chalkboard gag in the opening sequence was changed to read a single "We'll really miss you Mrs. K".
 The title is a spoof of "Four Weddings and a Funeral".