Guest Stars Matt Stone voices Butters Stotch Trey Parker voices Mr. Mackey April Stewart voices Liane Cartman Trey Parker voices Stephen Stotch Mona Marshall voices Linda Stotch April Stewart voices Principal Victoria Mona Marshall voices Red McArthur Trey Parker voices Pete Thelman Matt Stone voices Michael Mona Marshall voices Henrietta Biggle Nico Agnone voices Firkle Smith