Did 'Tracker' get too dark? Justin Hartley thinks so. “We peeled it back a little,” justinhartley tells EW of the show’s upcoming fourth season. “I was like, ‘Well, this guy can’t be killing six people per week. This is ridiculous.’” While you can expect fewer bodies in season 4, the increasingly dark and mysterious nature of Colter’s backstory remains the series’ disquieting through-line. With this comes the return of Jensen Ackles’ Russell in “a big way” early in the season — with a major secret. Swipe through for exclusive images of the season, and visit the link in entertainmentweekly's bio for more ahead of the show's Oct. 4 return. 📷: Mike Taing/CBS; Tyler Golden/CBS #Tracker #JustinHartley