Walker 3x15 "False Flag, Part Two" Season 3 Episode 15 Promo Trailer HD - BETRAYAL – In the thrilling second half of a two-part episode, the Texas Rangers and the Walker Family must contend with Grey Flag’s plans and one truth…that everything was a lie. David McWhirter directed the episode written by Bret VandenBos and Brandon Willer (315). Original airdate 3/30/2023.