Reacher author Lee Child on why he's feeling "professionally, incredibly jealous" of the Maria Sten-starring Francis Neagley spinoff series.

"That was the thing that I thought, 'How are they going to do this?'" the author says.When the main character trait of the titular hero in Reacher is that he's just really freakin' huge, how do you challenge him physically?

Television series "Reacher", based on the best-selling Jack Reacher books, returns for season three this week with the titular character going undercover.