Working on Justin Hartley's hit series Tracker has left quite an impression on one of the show's guest stars. During an exclusive interview with Us Weekly, Hallmark's Lachlan Quarmby recalled his guest appearance in season 1, saying, "Justin is awesome. He's straight in there. He's a real captain of that ship. That was a great time." Quarmby, who was promoting his Hallmark trilogy, Providence Falls, walked away from the hit CBS series with a very positive experience. "I got to do an Australian accent.