The announcement there would be a second season of Amazon Prime's 'Good Omens' came as a surprise. The initial run in 2019 was based on Neil Gaiman and the late great Terry Pratchett's novel, 'Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.' It's a story about an angel, Aziraphale, and a demon, Crowley, working together to prevent Armageddon. The story from this book concludes in six episodes.