Tracker Season 4 Episode 2, titled “Switchback,” aired on Sunday, October 11, 2026, at 9:00 PM ET/PT on CBS. The episode follows Colter Shaw as he searches for a mother and daughter who disappeared while hiking the Pacific Divide Trail after discovering they were being stalked. The episode brought back the show’s core cast alongside guest actors who played the missing hikers and the people connected to their disappearance. Here is the complete cast breakdown for “Switchback.”
Justin Hartley returns as Colter Shaw
Justin Hartley leads the cast as Colter Shaw, a reward seeker and survivalist who travels across the country to find missing people. Hartley is best known for playing Kevin Pearson in the NBC drama This Is Us and Oliver Queen on Smallville. In “Switchback,” Colter heads into the Sierra Nevada wilderness to track down a mother and daughter who vanished on the trail.
Fiona Rene plays Reenie Greene
Fiona Rene returns as Reenie Greene, Colter’s ally and a lawyer who frequently helps him with cases that require legal expertise. In this episode, Reenie assists Mel Day with investigating her mother’s murder case. Rene has appeared in shows like I Know What You Did Last Summer and The Lincoln Lawyer.
Chris Lee is back as Randy
Chris Lee plays Randy, the hacker on Colter’s team. Randy was promoted to a series regular ahead of Season 4, giving the character a bigger role this season. In “Switchback,” Randy’s hacking skills help Colter track down crucial evidence about the missing hikers and the truck connected to the kidnapping. Lee previously appeared in Legacies and The Resident.
Cassady McClincy Zhang as Mel Day
Cassady McClincy Zhang plays Melanie “Mel” Day, Reenie’s legal assistant. Zhang was also promoted to a series regular for Season 4 after recurring since Season 3. In “Switchback,” Mel takes a major step in investigating her mother’s murder. She asks Reenie for help and reveals that her mother’s colleague, a military officer named Eric Jeffries, retired early just days before the murder. Zhang is known for her role as Lydia in The Walking Dead.
Sarah Jane Morris guest stars as Leanne
Sarah Jane Morris guest stars as Leanne, the mother who goes missing on the Pacific Divide Trail. Leanne is hiking with her daughter Kayla when they are stalked by an unknown person. After being separated from Kayla at a dry creek bed, Leanne is knocked unconscious and later found by Colter. Morris has appeared in Brothers and Sisters, NCIS, and The Pitt.
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Mallory Bechtel plays Kayla Riley
Mallory Bechtel plays Kayla Riley, Leanne’s daughter who is kidnapped during the hike. Kayla senses early on that someone is following them, and her concerns turn out to be correct. Bechtel is known for her role in Pretty Little Liars: Original Sin.
Erica Hernandez as Becca, the trail angel
Erica Hernandez guest stars as Becca, a local trail expert known as the “Trail Angel” who helps Colter navigate the wilderness. Becca takes Colter to a dangerous secluded path called the “Thin Area” where they find evidence of the missing hikers. She later helps Colter pursue the suspect’s truck and is injured in the process. Hernandez has appeared in Jury Duty Presents.
Skyler Day as Anya Riley
Skyler Day plays Anya Riley, Kayla’s sister who reports the pair missing when they fail to show up at their supply stop. Anya brings the case to Randy, which sets the search in motion. Day previously appeared in The Resident.
Amy Farrington as Diana Sanders
Amy Farrington plays Diana Sanders, a woman connected to the kidnapping plot. Diana works at the Rise and Shine Cafe in Sierra Junction, where Colter stops during his search. Farrington has appeared in S.W.A.T. and Beyond.
Billy Lush as Jonah Gammon
Billy Lush plays Jonah Gammon, a man Colter encounters near the dry creek bed. Jonah claims he did not attack Leanne or take Kayla, but he tells Colter he saw a large man in a baseball cap stuff Kayla into a brown truck belonging to Sierra Junction. Lush is known for his role in For All Mankind.
Episode details and streaming information
“Switchback” was written by Travis Donnelly and Ryan O’Nan and directed by Jeff T. Thomas. The episode runs 42 minutes and is rated TV-14 for violence and coarse language.
Viewers in the United States can watch new episodes of Tracker live on CBS on Sundays at 9:00 PM ET/PT. Episodes stream on Paramount+ the day after they air. Paramount+ Premium subscribers can stream live, while Essential subscribers get on-demand access the following day. The series also airs on Paramount+ in the UK, Canada, and Australia, where new episodes typically arrive within a day of the U.S. broadcast. In India, Tracker streams on Paramount+ via Jio platforms.
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