“Homer Goes to Prep School” is the ninth episode of Season 24. It aired on January 6, 2013.
Homer joins the "Springfield Preppers," an off-the-grid survivalist group whose leader (guest voice Tom Waits) has set up a top-secret retreat outside of town to prepare for the end of the world, but Marge grows skeptical of the group's alarmist shenanigans.
They are brainwashing you. The CIA had something to do with this. They want to make you think the actual "Preppers" are nothing but crazy nut-job crack heads who think the end is near every day.Real Preppers know what is going on! They are not crazy. We know the truth.