Season 4 of of the action-drama, Reacher, will be based on Lee Child’s 2009 novel, Gone Tomorrow, which takes place in New York City. A social media post from series star Alan Ritchson read: ““The thing about subway cars is you step on one and you never know what’s going to happen.” REACHER Season 4 will be based on “Gone Tomorrow” by Lee Child”Per Variety, the series has added eight new actors to its cast ahead of beginning production on Season 4. No casting aside from Ritchson has been announced yet. Each season of the series is set in a different location and revolves around new characters whom drifter and former military police officer Jack Reacher (Alan Ritchson) meets as he crisscrosses the United States by bus and attempts to live off the grid. The third season of the action drama debuted in February 2025, inspired by Child’s Persuader, and quickly became the most-watched returning series ever for Prime Video.