The Tracker season 3 premiere is set to be a family reunion for Colter Shaw. CBS revealed that the first episode of the season is titled "The Process" and will air on Sunday, October 19. Jensen Ackles will be returning as Colter's (Justin Hartley) older brother, Russell Shaw, much to the delight of fans. "As Colter grapples with the shocking truth surrounding his father's death, Russell (Jensen Ackles) joins forces with his brother to help track down the missing wife and daughter of one of Reenie's clients," the official synopsis of the episode says.