- Television - Science Fiction Shows ## The Silo Casting That Initially Confused Series Author Hugh Howey "Silo" is based on author Hugh Howey's book trilogy "Wool," "Shift," and "Dust," and judging by the critical response, and the fact the show is set to return for a fourth and final season, it's been a very successful adaptation. But when Tim Robbins was cast as the head of the Silo's IT department Bernard Holland, Howey had some concerns — and that's putting it lightly. Adapting a popular book for the screen comes with numerous pitfalls. Casting is one of the most obvious, as you're…