Searxng/Tracker CBS TV Show tv Celebrity Tracker cast exits shake up season 4: Who's returning after multiple departures? May 6, 2026 AceShowbiz - Justin Hartley's hit CBS series Tracker has experienced several significant cast departures, raising questions about who will return for its upcoming fourth season. Since its debut in February 2024, the survivalist drama has followed fictional expert Colter Shaw, played by Hartley, as he travels across the country to solve missing persons cases.