EXCLUSIVE: Fox’s proposed Bones spinoff is starting to take shape with the first casting. And it’s a big one… literally. Michael Clarke Duncan has been tapped to co-star in the project, which will be introduced in Episode 19 this season. The spinoff, based on The Locator books written by Richard Greener, centers on Walter Sherman aka “the Locator” (the role is still being cast), a former military policeman who can find anything. Duncan will play Walter’s partner Leo, a tough, raw-hide cowboy philosopher. This marks the first regular TV gig for Duncan, repped by APA and Industry, who best known for his Oscar-nominated role in The Green Mile.