"The Entity" is the tenth 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.

The fifth season of South Park, an American animated television series created by Trey Parker and Matt Stone, began airing on June 20, 2001. The season concluded after 14 episodes on December 12, 2001. The 14-episode season length would become a standard for later years of the series, starting from the eighth season up until the sixteenth season.