The fearful boys speculate on the identity of their teacher as they begin the fourth grade, leading them to build a time machine to take them back to the safety of third grade.
Guest Cast
Matt Stone
voices Butters Stotch
Trey Parker
voices Mr. Garrison
Trey Parker
voices Mr. Mackey
Trey Parker
voices Clyde
Eliza Schneider
voices Wendy Testaberger
Isaac Hayes
voices Chef
Trey Parker
voices Timmy Burch
Matt Stone
voices TweekCast Appearances
Trey Parker
voices Stan Marsh
Matt Stone
voices Kyle Broflovski
Trey Parker
voices Eric Theodore Cartman
Matt Stone
voices Kenny McKormickEpisode Discussion
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