Reacher, Prime Video's exhilarating action thriller crime jewel, is back for its fourth season, and it's more muscular and unforgiving than ever. 'Reacher' Season 4 Has the Show's Most Complex Mystery So FarImage via Jessica Kourkounis/PrimeNarratively, Reacher Season 4 is the most intricate so far. 'Reacher' Season 4 Has One Hell of an Ensemble CastImage via Prime VideoImage via Prime VideoImage via Prime VideoAgnez Mo and Anggun in Reacher Season 4 Image via Prime VideoImage via Prime VideoClose Image via Prime VideoImage via Prime VideoImage via Prime VideoAgnez Mo and Anggun in Reacher Season 4 Image via Prime VideoImage via Prime VideoAs with previous seasons, Reacher finds much of its strength through its ensemble. Ultimately, Reacher Season 4 stays true to itself by delivering a fistful of rageful, determined justice that will have you cheering through gritted teeth. Reacher Season 4 premieres August 12 on Prime Video.