Cartman Gets an Anal Probe

"Kyle and Stan Get the Vipnet" is the 1st episode for the 1st season of "South Park". It was first shown on Comedy Central in the United States on August 13, 1997. The episode introduces the main characters, Stan Marsh and Kyle Broflovski. They try to rescue Kyle's brother Ike from a group of aliens.
Plot.
Stan, Kenny, Cartman, Kyle, and his little brother, Ike, are standing at the bus stop. Cartman tells them about the dream about getting abducted by aliens. The boys tell Cartman that it was not a dream and that he was actually abducted by aliens, but Cartman refuses to believe them. Chef drives up and asks the boys if they saw the space ship appearing in the sky. He tells stories about aliens performing anal probes. As the boys get on the bus and drive off they discover the aliens abducting Ike.
The boys are in the cafeteria and after Chef sees a machine emerge from Cartman's rear end, Chef helps the boys escape the school to save Ike by pulling the fire alarm. They escape outside and Cartman believes that being abducted by aliens was a dream until he is hit by a beam that makes him sing and dance and space ship appears. When Kyle throws a rock at the ship, it fires back and hits Kenny, who ends up getting killed by a herd of cows and a police car.
Stan, Kyle, and Wendy Testaburger meet at Stark's Pond and Wendy suggests that they use the device in Cartman's rear-end to contact the aliens, the boys tie Cartman to a tree, and a big satellite dish emerges from Cartman's rear-end. The spaceship appears and Ike leaps to safety. The aliens then begin to talk to the cows seeing them as the smartest species on the planet and Cartman is abducted once again, but is returned to the bus stop the next day.