Just Jared: 'Bosch' Prequel 'Bosch: Start of Watch' Greenlit at MGM+, Cameron Monaghan & Omari Hardwick to Star - A Bosch prequel series is officially in the works! - Amazon's MGM+ has just announced that Bosch: Start of Watch is greenlit and will begin filming next year with Cameron Monaghan and Omari Hardwick leading the cast.