The wait is finally over, and Prime Video's favorite heavy-hitter is back. Reacher Season 4 officially premiered on August 12, 2026, dropping us right back into the brutal, fast-paced world of Jack Reacher. This time around, our favorite ex-military investigator is trading the rural towns and corporate high-rises of previous seasons for the gritty, historical streets of Philadelphia. Based on Lee Child's acclaimed 2009 novel Gone Tomorrow, the stakes have never been higher, and the web of conspiracy is deeper than ever.