Reacher was rapidly renewed for Season 2 thanks to "wildfire"-like binging

TVLine

"I haven’t learned anything yet, but the term 'spreading like wildfire' was used," showrunner Nick Santora tells TVLine. "I don’t know how to qualify “wildfire,” but… the show is just doing incredibly well." Santora also discussed one major change to the book: "Lee Child was able to describe what the character was thinking at any given moment, but if we do that on TV, we have an hour of watching a guy, trying to guess what he is thinking at that moment. (Laughs) So we had to make Reacher a touch more verbal, but we tried to be very concise with our language and verbiage, and we tried to have Reacher only speak when necessary."