Justin Hartley‘s CBS series Tracker has won over its audience because of the intriguing cases — and the impressive guest stars.
Tracker, which premiered in February 2024, is centered around a survivalist named Colter (Hartley) who travels the country helping people and law enforcement tackle a variety of mysteries. As the series unfolds, viewers learn more about how Colter’s past shaped his current life as a lone wolf who prefers to isolate himself from others.
In addition to starring in the TV adaptation of Jeffery Deaver‘s novel The Never Game, Hartley is also an executive producer alongside This Is Us producer and director Ken Olin. His new role behind the scenes allowed Hartley to bring some familiar faces along for the ride.
Among the most memorable additions to the show so far was Hartley’s wife, Sofia Pernas, who made her first appearance in March 2024 as Colter’s ex Billie. The episode allowed Pernas and Hartley to share the screen on a third project — and this seems to be just the beginning.
After Tracker was renewed for a second season, Hartley confirmed that he planned to bring Pernas back. He also teased more appearances from actors such as Melissa Roxburgh and Jensen Ackles, who play members of Colter’s family.
Keep scrolling for a guide to Tracker‘s most iconic guest stars:
Sofia Pernas (Billie)
Tracker’s first season introduced viewers to Billie, who formed a connection with Colter until she tricked him out of a reward. The pair reunited to work on another case, and it didn’t take long for sparks to reignite. Despite Colter’s attempt to rekindle things with Billie, she asked for a raincheck, which might come sooner rather than later.
Ed Araquel/CBS
Jon Huertas
Hartley was reunited with his This Is Us costar when Huertas directed an April 2024 episode of the show. The duo previously worked together on the NBC series, which ran from 2016 to 2022. Huertas exclusively told Us Weekly that he was already in talks to return at least as a director for more episodes of Tracker.
Michael Courtney/CBS
Gil Birmingham (Gus)
Before Birmingham played a friend of Reenie’s (Fiona Rene) father on Tracker, he starred on Yellowstone and appeared in the Twilight franchise. Birmingham joined the CBS procedural in a heart-pounding episode that saw Colter skydiving into an isolated forest in order to track down several people presumed to be missing after a plane crash.
Sergei Bachlakov/CBS
Melissa Roxburgh (Dory)
Tracker hinted at Colter’s siblings so much that it almost felt as if no one could live up to that honor. The Manifest alum, however, left quite an impression as Colter’s sister, Dory, who assisted him on a case surrounding a missing college student. Hartley has since confirmed that Dory would be revisited in upcoming episodes of the show.
Sergei Bachlakov/CBS
Jensen Ackles (Russell)
Throughout season 1, viewers slowly learned about Colter’s issues with his brother, Russell (Ackles). Colter has hinted that he was on the outs with Russell because he thought his older brother was responsible for their father’s death. The siblings got an opportunity to hash out the drama when Russell made an appearance in a May 2024 episode.
Ackles’ performance as Russell immediately won viewers over (and even dropped some Easter eggs for Ackles’ Supernatural fans), so it should come as no surprise that he is expected to return in the future.
Michael Courtney/CBS
Jennifer Morrison
Hartley worked with Morrison on This Is Us before recruiting the actress to appear on his newest project. According to a trailer for the May 2024, episode, Morrison is a childhood friend of Colter’s who needed his help.
Darko Sikman/CBS
