After the production of the previous episode, the voice actor of many female South Park roles, Mary Kay Bergman, committed suicide. Trey Parker and Matt Stone, still in shock from the tragic ordeal, did not feel like auditioning people right away, which is why this episode features no female voices (Trey Parker voices the S'mores Schnapps Lady and Kenny's mom appears with no speaking parts).
Contains the first appearance of Al Gore in South Park, and he is voiced by Matt Stone instead of Trey Parker, who voices him in later episodes such as ManBearPig (2006)
This episode began the change in Cartman's voice, particularly during the bulk of the episode where he speaks using a Southern accent.
The Visitors' home planet is seen, as well as Starvin' Marvin's new home, Marklar, when Kyle rips Cartman's beard off.