‘Reacher‘ Season 4 premieres August 12, 2026, on Prime Video, and the roster surrounding Alan Ritchson has shifted considerably from the first three seasons. Here is a full breakdown of who is walking into ‘Reacher’ Season 4 and who is walking away from it. Alan Ritchson – Jack Reacher (returning)There was never any doubt this one was happening. Sydelle Noel, known from Glow, plays Tamara Green, a Philadelphia police detective who is a reimagined version of Theresa Lee, the homicide detective from the book. Kevin Corrigan – Detective Docherty (new)Kevin Corrigan, known for Goodfellas and True Romance, plays NYPD homicide detective Shaun Docherty in Season 4.