The twelfth season of South Park, an American animated television series created by Trey Parker and Matt Stone, began airing on March 12, 2008. The twelfth season concluded after 14 episodes on November 19, 2008. Saturday Night Live cast member Bill Hader is credited as a consultant starting with this season. Parker was the director and writer in this twelfth season. Stone was also the writer on the third episode of the twelfth season.

With Apologies to Jesse Jackson, Cartman Sucks, Lice Capades, The Snuke, Fantastic Easter Special, D-Yikes!, Night of the Living Homeless, Le Petit Tourette, More Crap, Imaginationland, Imaginationland Episode II, Imaginationland Episode III, Guitar Queer-o, The List, The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it.

The Return of Chef, Smug Alert!, Cartoon Wars Part I, Cartoon Wars Part II, A Million Little Fibers, Manbearpig, Tsst, Make Love, Not Warcraft, Mystery of the Urinal Deuce, Miss Teacher Bangs a Boy, Hell on Earth 2006, Go God Go, Go God Go XII, Stanley’s Cup, The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it.

Mr. Garrison’s Fancy New Vagina, Die Hippie, Die, Wing, Best Friends Forever, The Losing Edge, The Death of Eric Cartman, Erection Day, Two Days Before the Day After Tomorrow, Marjorine, Follow that Egg!, Ginger Kids, Trapped in the Closet, Free Willzyx, Bloody Mary, The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it.

Good Times with Weapons, Up the Down Steroid, The Passion of the Jew, You Got F’d in the A, AWESOM-O, The Jeffersons, Goobacks, Douche and Turd, Something Wall-Mart This Way Comes, Pre-School, Quest for Ratings, Stupid Spoiled Whore Video Playset, Cartman’s Incredible Gift, Woodland Critter Christmas. The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it.

Cancelled, Krazy Kripples, Toilet Paper, I’m a Little Bit Country, Fat Butt and Pancake Head, Lil' Crime Stoppers, Red Man’s Greed, South Park Is Gay, Christian Rock Hard, Grey Dawn, Casa Bonita, All About the Mormons?, Butt Out, Raisins, It’s Christmas in Canada. The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it.

Jared Has AIDS, Asspen, Freak Strike, Fun with Veal, The New Terrance and Phillip Movie Trailer, Professor Chaos, The Simpsons Already Did It, Red Hot Catholic Love, Free Hat, Bebe’s Boobs Destroy Society, Child Abduction Is Not Funny, A Ladder to Heaven, The Return of the Fellowship of the Ring to the Two Towers, Death Camp of Tolerance, The Biggest Douche in the Universe, My Future Self 'n' Me, Red Sleigh Down. The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it.

It Hits the Fan, Cripple Fight, Super Best Friends, Scott Tenorman Must Die, Behind The Blow, Cartmanland, Proper Condom Use, Towelie, Osama Bin Laden Has Farty Pants, How to Eat with Your Butt, The Entity, Here Comes the Neighborhood, Kenny Dies, Butters' Very Own Episode. The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it.

The curious, adventure-seeking, fourth grade group of boys, Stan, Kyle, Cartman, and Kenny, all join in in buffoonish adventures that sometimes evolve nothing. Sometimes something that was simple at the start, turns out to get out of control. Everything is odd in the small mountain town, South Park, and the boys always find something to do with it. The Tooth Fairy Tats, Cartman’s Silly Hate Crime, Timmy 2000, Quintuplets 2000, Cartman Joins NAMBLA, Cherokee Hair Tampons, Chef Goes Nanners ... South Park has received numerous accolades, including five Primetime Emmy Awards, a Peabody Award, and numerous inclusions in various publications' lists of greatest television shows. The show's popularity resulted in a feature-length theatrical film, South Park: Bigger, Longer and Uncut which was released in June 1999, less than two years after the show's premiere, and became a commercial and critical success. In 2013, TV Guide ranked South Park the tenth Greatest TV Cartoon of All Time.

When four boys in South Park Stan Marsh, Kyle and his stepbrother Ike Broflovski, Eric Cartman, and Kenny McCormick sees an R-rated movie featuring Canadians "Terrance & Phillip: Asses of Fire", they are pronounced "corrupted", and Kyle's mom Sheila with the rest of the parents pressure the United States to wage war against Canada for World War 3! It's all up to Stan, Kyle and Cartman to save Terrence and Phillip before Satan and his lover Saddam Hussein from Hell rules the world and it'll be the end of the whole world.