Down by the River 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. Details Casts Title Down by the River Genres Western Crime Drama Release Date 2015-09-10 Episode Runtime 00 Hours 45 Minutes Season Number 4 Episode Number 1 Production Companies Two Boomerang, Warner Horizon Television, The Shephard/Robin Company Robert Taylor Walt Longmire Katee Sackhoff Victoria 'Vic' Moretti Lou Diamond Phillips Henry Standing Bear Cassidy Freeman Cady Longmire Adam Bartley Ferg