Since Tracker premiered on CBS, Justin Hartley has taken it upon himself to remind viewers that his character Colter Shaw can - and will - die. Based on Jeffery Deaver's novel The Never Game, Tracker centers around a survivalist named Colter who travels the country helping find missing people (or sometimes dogs) and solving cases others wouldn't. As the series unfolds, viewers learn more about how Colter's past shaped his current life as a lone wolf. Hartley not only stars on the show, but he also serves as an executive producer alongside This Is Us producer and director Ken Olin.