T he perpetrators of the Mountain Meadows Massacre have spent much of American Primeval talking about tying up loose ends. Now it’s the series’ turn. American Primeval’s pen

This episode fleshes out the world these characters inhabit, as well as the lives some of them have led. The key figure here is Isaac, the tracker who rescued Sara Holloway and her son Devin from certain death at the hands of the Mormon militia the Nauvoo Legion and their indigenous allies.

In this episode alone, for example, Sara, Isaac, Devin, and Two Moons trudge their way through blinding snows on horseback, until one goes lame and stomps Devin’s leg to smithereens in its distress after Isaac tries and fails to shoot it to death.