Season 4

01 Down by the River Episode 110th September 2015 The team struggles with the fallout from Branch's confrontation with Barlow, and Walt's crusade to bring Nighthorse to justice spins out of control. 02 War Eagle Episode 210th September 2015 Walt is forced to split his focus between new evidence in a personal case, and the murder of a caretaker at a former Japanese internment camp. 03 High Noon Episode 310th September 2015 The investigation of Nighthorse heats up, but not in the way that Walt was hoping for. Cady makes a shocking discovery. 04 Four Arrows Episode 410th September 2015 A body found in the luggage of a tour bus further complicates Walt's troubles with Nighthorse. Henry makes a bold move to help a mother and son. 05 Help Wanted Episode 510th September 2015 When the husband of a former soldier is assaulted during an apparent robbery, Walt is drawn into an emotionally charged investigation. 06 The Calling Back Episode 610th September 2015 A young Native American girl is raped on the reservation, which sparks new, volatile tensions between local oil rig workers and the Cheyenne people. 07 Highway Robbery Episode 710th September 2015 A highway robbery sets off an investigation into a strange relationship, while Walt struggles to let go of the past. 08 Hector Lives Episode 810th September 2015 When a former suspect in a rape case ends up dead in another county, Walt and Vic aren't convinced the death is an accident. 09 Shotgun Episode 910th September 2015 Henry's attempt at justice backfires, resulting in new problems for him and a new investigation for Walt. 10 What Happens on the Rez... Episode 1010th September 2015 The line between justice and the law gets even blurrier for Henry and Walt as their hunt for a killer intensifies.