Krusty learns that he did not have a bar-mitzvah as a boy because he was considered too disruptive, so he plans to have one as an adult. Whilst he is studying for it Homer replaces his television show with a panel game, which is initially successful but then bombs. To restore ratings it is suggested that Krusty have a glitzy, televised, bar-mitzvah with guest star Mr. T. but, sensing his father's disapproval, Krusty opts for a more traditional one.
—don @ minifie-1