In A Canticle for Leibowitz, the 1959 post-apocalyptic classic by Walter M. Miller, Jr., a secluded order of monks have dedicated themselves to preserving knowledge that predates an apocalyptic event several centuries prior. But what to do when people come asking for it? Is mankind doomed to repeat its mistakes forever? This week we're doomed to chat about cyclical history, the first rule of improv, space monks and desert priests, and Casey Kasem's Roaring 20s.