Justin Hartley's Tracker has gone through some surprising cast changes, so who is expected to appear in season 3? Tracker, which premiered in February 2024, follows survivalist Colter (Hartley) as he travels the country to help find missing people, track down information on criminal cases and more. As the cases have grown more complex, Colter has received help from an ensemble cast of characters, including handlers Teddi (Robin Weigert) and Velma (Abby McEnany), hacker Bobby (Eric Graise) and attorney Reenie (Fiona Rene).