South Park

Season 2, Episode 11

Episode Title: Roger Ebert Should Lay Off the Fatty Foods

Air Date: 1998-09-02

Overview:

The kids go on a field trip to the planetarium. All of the children except Cartman are acting weird. As usual Stan and Kyle, with Kenny's sacrifice, try to get to bottom of the mystery. Meanwhile, Cartman wins an appearance on a snack commercial. The four boys get to the root of the strange planetarium.