Tracker season 4 cast details are now clearer following the fourth-season premiere on CBS, with Justin Hartley returning as Colter Shaw and Fiona Rene, Chris Lee, and Cassady McClincy Zhang forming the current core ensemble. Season 4 premiered Sunday, October 4, 2026, and CBS has already confirmed the cast appearing in the early episodes, including several returning guest performers.
The new season brings another significant change to the show’s lineup. Cassady McClincy Zhang, who previously appeared as Mel in a recurring role, has been promoted to a series regular. That gives the series four regular performers heading into Season 4: Hartley, Rene, Lee, and McClincy Zhang.
Several familiar faces remain connected to the series through guest or recurring appearances. Jensen Ackles continues to appear as Colter’s brother, Russell Shaw, while Sofia Pernas returns as Billie Matalon. Sarah Jane Morris is also confirmed as a guest star in the second episode, “Switchback.”
The Season 4 cast reflects the show’s evolving structure. Some original regulars are no longer part of the regular ensemble, while characters introduced later have become more important to Colter’s ongoing cases.
Justin Hartley returns as Colter Shaw
Justin Hartley remains the central star of Tracker Season 4. He plays Colter Shaw, the show’s highly skilled survivalist and reward seeker who travels across the United States helping people locate missing family members and solve dangerous cases.
CBS continues to identify Hartley as the star of the series and as an executive producer. Colter remains the primary character around whom the season’s investigations are built.
Season 4 also marks another change in the show’s production environment. The series moved production from Vancouver to Los Angeles for its fourth season. That change gives Hartley’s character a new range of locations while keeping Colter’s nationwide investigations at the center of the story.
The fourth-season premiere, titled “Safe Harbor,” places Colter in a dangerous investigation involving a missing teenage boy’s father. His search leads him toward a criminal operation at the Port of Los Angeles.
Hartley’s continued presence is especially important because Colter remains the show’s consistent link between its changing supporting characters.
Fiona Rene returns as Reenie Greene
Fiona Rene is back as Reenie Greene, Colter’s attorney and one of the most important members of his professional circle.
Reenie has become increasingly significant as the series has changed its ensemble. After several original cast departures, Rene remained one of the show’s two series regulars during Season 3 alongside Hartley. Her return for Season 4 keeps that established connection between Colter’s investigations and Reenie’s legal expertise.
Season 4 gives Reenie another important connection through Mel, played by Cassady McClincy Zhang. CBS promotional material for the second episode specifically identifies Rene as Reenie and McClincy Zhang as Mel, confirming their continued involvement in the new season.
Reenie’s role also helps maintain continuity within Colter’s wider network. While Colter frequently operates alone in the field, his cases often benefit from information, contacts, and support from people outside the immediate investigation.
Chris Lee returns as Randy
Chris Lee returns as Randy, another key member of Colter’s team.
Randy’s role has become increasingly important as the show’s original team structure has changed. CBS currently lists Chris Lee among the show’s starring cast, alongside Justin Hartley and Fiona Rene.
His continued presence gives the series another established character who can work outside Colter’s direct field investigations. Randy’s relationship with the rest of the team also helps keep the show’s supporting ensemble connected.
CBS promotional material for Season 4 continues to identify Lee with the series, and official Season 4 imagery includes him among the returning performers.
Cassady McClincy Zhang becomes a series regular
One of the biggest confirmed changes to the Season 4 cast is Cassady McClincy Zhang’s promotion to series regular.
She plays Mel, who works as Reenie’s assistant. McClincy Zhang had previously appeared in a recurring capacity, but Season 4 gives the character a larger official position within the ensemble.
The promotion is significant because Tracker has undergone several cast changes since its debut. The series originally launched with a larger regular ensemble, but later seasons saw multiple departures.
With McClincy Zhang becoming a regular, Season 4 restores the show’s regular cast to four performers. Those four are:
| Actor | Character | Season 4 status |
|---|---|---|
| Justin Hartley | Colter Shaw | Series regular |
| Fiona Rene | Reenie Greene | Series regular |
| Chris Lee | Randy | Series regular |
| Cassady McClincy Zhang | Mel | Series regular |
The four-person lineup is the current core cast identified for the fourth season.
Jensen Ackles returns as Russell Shaw
Jensen Ackles continues to play Russell Shaw, Colter’s brother.
Russell is not listed as one of the four regular Season 4 cast members. Instead, Ackles returns in a guest-starring capacity. His involvement remains important because Russell is one of the show’s central family characters.
CBS’s Season 4 promotional material includes Ackles and Hartley together in official images connected with the series.
Ackles has already been an important recurring presence in the show’s family storyline. Russell and Colter have worked together on cases, particularly when investigations involve the Shaw family’s history.
The character’s return also continues a storyline that has developed across multiple seasons. CBS previously confirmed Ackles’ guest-starring role as Russell during Season 3, and the character remained part of the show’s larger family narrative.
Season 4 therefore keeps Russell available without making him part of the show’s four-person regular cast.
Sofia Pernas returns as Billie Matalon
Sofia Pernas is also returning to Tracker as Billie Matalon.
Billie is a former associate of Colter and has developed a complicated personal and professional relationship with him. Pernas previously appeared in the series, and CBS confirmed her return during Season 3 as Billie.
Her Season 4 return was confirmed ahead of the new season, making her one of the notable recurring performers connected to the new episodes.
Pernas’ return is particularly notable because Billie occupies a different place in Colter’s world from Reenie and the other members of his regular team. Her connection with Colter is rooted in their shared history and professional relationship.
The character therefore adds another established figure to the Season 4 cast without changing the show’s official four-person regular lineup.
Sarah Jane Morris joins the Season 4 guest cast
Sarah Jane Morris is confirmed to appear as Leanne in Season 4.
CBS lists Morris as a guest star in the second episode, “Switchback,” which is scheduled for October 11, 2026. The episode follows Colter as he investigates the disappearance of a mother and daughter who vanished while hiking the Pacific Divide Trail.
Morris is therefore confirmed for the season, but CBS’s official episode information identifies her as a guest performer rather than a series regular.
That distinction matters when looking at the current cast. The regular ensemble consists of Hartley, Rene, Lee, and McClincy Zhang, while performers such as Morris join individual storylines.
Erica Hernandez appears in Season 4
Erica Hernandez is also confirmed for the fourth season.
CBS lists Hernandez as Becca in the second episode, “Switchback.” Official Season 4 photographs also feature Hernandez alongside Justin Hartley, confirming her presence in the episode.
Her appearance is tied to the episode’s missing-person investigation rather than the show’s regular team. As a result, she belongs in the confirmed Season 4 guest cast rather than the regular ensemble.
The distinction between regular and guest performers is especially important for Tracker because the show frequently introduces new characters around each individual investigation.
The Season 4 premiere also features guest performers
The first episode, “Safe Harbor,” premiered on October 4, 2026.
CBS’s official Season 4 material identifies Derek Phillips and Hiram Murray among the performers associated with the premiere. Official photographs also show Justin Hartley with Derek Phillips and Hiram Murray in connection with the episode.
The premiere centers on Colter’s investigation into a missing father. The case leads him to a criminal operation at the Port of Los Angeles, providing the first major case for the new season.
These performers are part of the episode’s guest cast rather than the permanent Tracker team.
Who is not part of the Season 4 regular cast?
Tracker’s fourth season also needs to be understood in the context of earlier departures.
Robin Weigert, who played Teddi Bruin, was written out after Season 1. Abby McEnany, who played Velma Bruin, and Eric Graise, who played Bobby Exley, later departed as series regulars before Season 3.
Their absence continues into the current Season 4 lineup.
That means viewers should not expect the original five-person ensemble to return in its former configuration. The show’s current regular cast is smaller and centers on Colter, Reenie, Randy, and Mel.
The changes can be summarized as follows:
- Justin Hartley: Returning as Colter Shaw.
- Fiona Rene: Returning as Reenie Greene.
- Chris Lee: Returning as Randy.
- Cassady McClincy Zhang: Promoted to series regular as Mel.
- Jensen Ackles: Returning as Russell Shaw in a guest role.
- Sofia Pernas: Returning as Billie Matalon.
- Sarah Jane Morris: Guest starring as Leanne.
- Erica Hernandez: Guest starring as Becca.
- Derek Phillips: Appearing in the Season 4 premiere.
- Hiram Murray: Appearing in the Season 4 premiere.
- Robin Weigert: Not part of the current regular Season 4 lineup.
- Abby McEnany: Not part of the current regular Season 4 lineup.
- Eric Graise: Not part of the current regular Season 4 lineup.
How the Season 4 cast has changed
The biggest difference from the original cast is the smaller permanent ensemble.
When Tracker debuted in 2024, the regular cast included Hartley, Rene, Weigert, McEnany, and Graise. After subsequent departures, the show’s regular structure changed considerably.
Season 4 takes another step by promoting McClincy Zhang to series regular. Her promotion gives Reenie’s side of the story a stronger permanent presence.
The result is a more streamlined core cast:
Colter Shaw remains the lead. Reenie Greene remains his established legal connection. Randy continues as a member of his support network. Mel now has a formal series-regular position.
Meanwhile, guest performers can rotate into individual cases without becoming permanent members of the core group.
Season 4 cast and the new episode lineup
Season 4 officially began with “Safe Harbor” on October 4.
The next confirmed episode is “Switchback,” scheduled for October 11. CBS lists Erica Hernandez as Becca and Sarah Jane Morris as Leanne for that episode.
The third episode, “Original Parts,” is scheduled for October 18. CBS has already released Season 4 promotional material connected with the episode, including images featuring Justin Hartley and Gillian Bolt.
This early episode information shows how Season 4 is using a combination of its regular ensemble and individual guest performers.
The core cast remains stable while each case introduces additional characters.
Where to watch the Season 4 cast
Tracker Season 4 airs on CBS in the United States.
The fourth season premiered October 4, 2026, and CBS lists the show in its Sunday-night schedule. Episodes are also available through Paramount+, with availability depending on the subscriber’s plan.
The second episode, “Switchback,” is scheduled for October 11 at 9 p.m. ET/PT according to CBS’s official episode information.
For viewers following the cast, the most important distinction is that not every familiar actor has the same status. Hartley, Rene, Lee, and McClincy Zhang make up the current regular ensemble, while Ackles and Pernas return through guest or recurring roles.
Frequently Asked Questions
Who is the main cast member in Tracker Season 4?
Justin Hartley remains the lead actor in Season 4. He plays Colter Shaw, the skilled tracker and survivalist at the center of the CBS drama.
Who are the four regular cast members in Season 4?
The current regular ensemble consists of Justin Hartley as Colter Shaw, Fiona Rene as Reenie Greene, Chris Lee as Randy, and Cassady McClincy Zhang as Mel.
Is Cassady McClincy Zhang a series regular in Season 4?
Yes. McClincy Zhang was promoted from a recurring role to series regular for Season 4. She plays Mel, Reenie’s assistant.
Is Jensen Ackles returning to Tracker Season 4?
Yes. Jensen Ackles returns as Russell Shaw, Colter’s brother. His role is a guest-starring position rather than one of the show’s four regular cast roles.
Is Sofia Pernas returning as Billie?
Yes. Sofia Pernas returns as Billie Matalon. CBS previously confirmed her return to the series, and current Season 4 coverage confirms that she remains connected to the new season.
Is Sarah Jane Morris in Season 4?
Yes. Sarah Jane Morris is confirmed as Leanne in the second episode, “Switchback,” scheduled for October 11, 2026.
Are Abby McEnany and Eric Graise returning as regulars?
No. Abby McEnany and Eric Graise departed the regular cast before Season 3 and are not part of the current Season 4 regular lineup.
Is Robin Weigert returning as a regular?
No. Robin Weigert’s Teddi was written out after Season 1, and she is not part of the Season 4 regular cast.
When did Tracker Season 4 premiere?
Season 4 premiered on Sunday, October 4, 2026, on CBS. The season also streams through Paramount+.
Who plays Mel in Tracker Season 4?
Cassady McClincy Zhang plays Mel. The character previously had a recurring role before becoming a series regular for Season 4.
Who plays Reenie Greene in Season 4?
Fiona Rene continues to play Reenie Greene. CBS lists Rene among the show’s principal Season 4 cast.
Who plays Randy in Season 4?
Chris Lee continues as Randy. CBS lists Lee as part of the starring cast for the fourth season.
Final update on the Season 4 cast
The current Tracker Season 4 lineup is built around Justin Hartley, Fiona Rene, Chris Lee, and newly promoted series regular Cassady McClincy Zhang. Jensen Ackles and Sofia Pernas remain important returning performers, while the new season also introduces confirmed guest performers for individual investigations.
With Season 4 already underway, the cast picture is no longer based on speculation about who might return. CBS has confirmed the principal lineup and has released official information for the opening episodes, giving viewers a clear picture of the performers currently attached to the season.
Which Season 4 cast member are you most excited to see? Share your thoughts and stay tuned for confirmed cast updates as the season continues.
Readers interested in other upcoming television developments can also explore the latest Marshalls Season 2 release date updates and what is currently known about the show’s return.