The fourth season hasn’t even been released yet, and Tracker is somehow already generating buzz. Ahead of the premiere of new episodes starting on October 4, new details have emerged about what to expect from Justin Hartley’s incredibly successful procedural thriller series. Over three seasons, Hartley’s character, Colter Shaw, has tracked down all manner of missing persons while leaving a trail of bodies in his wake. Now, in a new interview, the series star and executive producer opened up about what’s coming in the newest season, including a dark shift that will shape how the series moves forward.

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