[This story contains spoilers from the Dark Winds season four finale, “Ni’ Hodisxos” (The Glittering World).] Heading into the final episode of Dark Winds season four, which aired Sunday, things were looking pretty bleak for Joe Leaphorn and Billie, the teenager he and the Navajo Tribal Police have been trying to protect all season long. Irene Vaggan (Franka Potente) proved to be a worthy adversary for Leaphorn, and an unpredictable one.  After abducting Leaphorn (Zahn McClarnon) and Billie (Isabel DeRoy-Olson) in the penultimate episode, Vaggan held them in her bunker as sort of a dollhouse family, trying to manipulate them into pretending the kind of filial bonds she’d never experienced. In the end, Joe’s quick thinking and observation allowed him to free Billie and himself and finally arrest Vaggan. He also unraveled Vaggan’s plot to have her boss, mobster Dominic McNair (Titus Welliver), cleared through false testimony. Chee (Kiowa Gordon), meanwhile, found healing from his ghost sickness after the whole community turned out for his ceremony. But just when it looked like Joe was ready …