Reacher Season 4 premieres August 12, 2026 on Prime Video, with the first three episodes dropping that day before the show shifts to a weekly schedule through September 16. Buried in that same announcement: the Neagley spinoff launches on September 16 too, the exact day Reacher Season 4 ends, which is not a scheduling accident. Prime Video confirmed Reacher Season 4 begins streaming August 12, 2026, with three episodes available at launch and one new episode every week after