Jump to season: 1 - 2 - 3 - 4

Season 1

1x01 - Cartman Gets an Anal Probe
1x02 - Volcano
1x03 - Weight Gain 4000
1x04 - Big Gay Al's Big Gay Boat Ride
1x05 - An Elephant Makes Love to a Pig
1x06 - Death
1x07 - Pink Eye
1x08 - Starvin' Marvin
1x09 - Mr. Hankey, the Christmas Poo
1x10 - Damien
1x11 - Tom's Rhinoplasty
1x12 - Mecha-Streisland
1x13 - Cartman's Mom is a Dirty Slut (1)

Season 2

2x01 - Terrance & Phillip in "Not Without My Anus"
2x02 - Cartman's Mom is Still a Dirty Slut (2)
2x03 - Chickenlover
2x04 - Ike's Wee Wee
2x05 - Conjoined Fetus Lady
2x06 - The Mexican Staring Frog of Southern Sri Lanka
2x07 - City on the Edge of Forever (a.k.a. Flashbacks)
2x08 - Summer Sucks
2x09 - Chef's Salty Chocolate Balls
2x10 - Chickenpox
2x11 - Roger Ebert Should Lay Off the Fatty Foods
2x12 - Clubhouses
2x13 - Cow Days
2x14 - Chef Aid
2x15 - Spookeyfish
2x16 - Merry Christmas Charlie Manson
2x17 - Gnomes
2x18 - Prehistoric Iceman

Season 3

3x01 - Rainforest Schmainforest
3x02 - Spontaneous Combustion
3x03 - Chef's Mama
3x04 - Tweek vs. Craig
3x05 - Jakovasaurs
3x06 - Sexual Harrassment Panda
3x07 - Cat Orgy
3x08 - Melvins
3x09 - Jewbilee
3x10 - Chinpokomon
3x11 - Starvin' Marvin in Space
3x12 - Korn's Groovy Pirate Ghost Mystery
3x13 - Hooked on Monkey Fonics
3x14 - War
3x15 - Mr. Hankey's Christmas Classics
3x16 - Are you there God? It's me, Jesus!
3x17 - Worldwide Recorder Contest

Season 4

4x01 - Cartman's Silly Hate Crime 2000
4x02 - Timmy 2000
4x03 - Cartman Joins NAMBLA
4x04 - Cherokee Hair Tampons
4x05 - Chef Goes Nanners
4x06 - Something You Can Do With Your Finger (a.k.a. Fingerbang)
4x07 - Do the Handicapped Go to Hell? (1)
4x08 - Probably (2)
4x09 - 4th Grade
4x10 - Trapper Keeper
4x11 - Helen Keller: The Musical
4x12 - Pip (a.k.a. Great Expectations)
4x13 - Fat Camp
4x14 - The Wacky Molestation Adventure
4x15 - A Very Crappy Christmas

Random South Park Trivia

The creators of the show, Matt Stone and Trey Parker, based the Stan Marsh and Kyle Brosfloski characters after themselves (Stan being Parker and Kyle being Stone.) The Eric Cartman character was partly based on Archie Bunker.