Only G.K. Chesterton could write a detective novel about undercover poet cops bravely battling anarchists as a way of explaining the problem of evil and the revelation of God in nature. In this week's episode, Drs. Crystal and David C. Downing sit down with Producer Aaron Hill to unpack all the twists and turns in The Man Who Was Thursday—a book that is equal parts profound, existential, exhilarating, and perplexing.