Tracker is known for a cast that comes and goes from the show - but Justin Hartley is now revealing if past characters will return following numerous offscreen exits. "We have a really great, I guess, list of characters that we've had in the past and actors that we've had play those characters that if we can get them to return - and I think they will - they all really love Tracker," Hartley, 49, told TV Insider on Sunday, March 1. "It's cool." He continued: "I always like the idea of seeing returning characters and going, 'Oh, I remember when they had that conversation. That was cool. Oh, OK.