The Entity " is the eleventh episode of the fifth season of the animated television series '' South Park '' , and 76th episode of the series overall . " The Entity " originally aired in the United States on November 21 , 2001 on Comedy Central . This episode introduces Kyle 's cousin Kyle . Creators Trey Parker and Matt Stone have stated the story was inspired by the Segway PT and the general chaotic nature of airports at the time of the production , shortly following 9/11 and the 2001 airline bailout
9/11
September 11 attacks
The Entity (South Park)