Prime Video Reacher will be back for a fifth season at Prime Video! Season four has not yet debuted at the streamer, but they already greenlit the new season ahead of what is expected to be a big debut. The show is based on the Lee Child books. "From Lee Child's globally beloved novels to its standout on-screen adaptation, Reacher has evolved into a true powerhouse franchise. The series' ability to combine high-octane action with compelling character storytelling continues to resonate with tens of millions of viewers around the world.