'Reacher' Season 4 Just Confirmed Location and Plot

The next adventure of Jack Reacher (Alan Ritchson) is coming in very soon in Season 4 of the hit Prime Video series Reacher. And, as filming begins on Reacher Season 4, Amazon has seemingly just confirmed not only the location for the next adventure, but has also revealed the plot by hinting at which very popular book will be the basis for this season.

On Wednesday night, June 11, the official Prime Video Reacher Instagram account dropped a cryptic photograph of a script sitting on the bench of a subway with the words "Reacher Season 4" printed on the cover. The caption for the post simply reads "REACHER S4..."

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What can it mean? Well, for fans of the Lee Child novels, this sneaky Instagram puzzle is actually quite simple. The photograph is meant to be a bench on the famous New York City MTA subway system. Obviously, that means Reacher Season 4 is taking place in NYC, and likely on the subway. Whether or not the show is actually filming in NYC, or simply a replica of the NYC subway, isn't clear. Season 3 took place in and around Portland, Maine, but was filmed in Ontario, Canada.

The point is, Reacher Season 4 is taking place in NYC, probably on the subway. So, which book happens in NYC on the subway? Again, for fans, this is an easy one: the book is Gone Tomorrow, the 13th Reacher book ever, first published in 2009. The plot involves Reacher dealing with a mysterious family called the Hoths, and begins with Reacher himself riding the NYC subway very early in the morning.

To be fair, the books The Hard Way (2006) and Tripwire (1999) also feature NYC, but Gone Tomorrow still seems like the best bet.

So, there you have it, Reacher is headed to the Big Apple for Season 4, and one of the most pulse-pounding, classic books in the series will almost certainly serve as the basis for the next batch of episodes. Season 1 was based on the first book, Killing Floor (1997), Season 2 was adapted from Bad Luck and Trouble (2007), and Season 3 was based on Persuader (2003).

Speaking to Men's Journal earlier this year, author Lee Child, the creator of Reacher, made it clear that the adventures were written in such a way that someone could read the books in any order. "I want them to be able to read that as equal to any other book in the series," he said. "I don't want you to feel left out." So, it doesn't matter that Gone Tomorrow wasn't the book right after Persuader. And it also probably means that Reacher Season 4 will be an utterly fresh start, full of new bad guys, new stunts, and, if we're lucky, a lot of fantastic twists.

Reacher Season 4 does not yet have a release date.

Related: How to Read the Jack Reacher Books in the Correct Order (Hint: It's Not What You Think)