Tracker season 4 casts Lost fan-favourite in key new guest role for upcoming episode

The cast of Tracker season 4 has expanded, with Lost star Josh Holloway joining the fray in a key guest role.

Based on The Never Game by Jeffery Deaver, Tracker revolves around Colter (Justin Hartley), a lone survivalist who uses his instincts and skills to find missing people and collect rewards, while being accompanied – typically remotely – by Reenie (Fiona Rene) and Randy (Chris Lee).

Season 4, which is currently airing season 4 on CBS in the US, continues to follow Colter as he travels to assist people in difficult situations and returns mostly to a case-of-the-week format.

Holloway, who is best known for playing plane crash survivor Sawyer on Lost, will make his Tracker debut in season 4 episode 7, which will air on 22 November.

The actor will star as Luke Kelsol, a tracker "whose reckless methods and questionable morals have put innocent lives at risk," according to the official description.

"When Colter is hired to locate the owner of a small South Carolina inn, the search puts him at odds with" Luke, the description continues.

Alongside Lost, Holloway's other credits include whose other credits include Duster, Yellowstone and Intelligence.

Series star Hartley previously teased that season 4 will be "incredible" and "our most ambitious season to date".

Speaking to TheWrap in May 2026, he said: "We’ll come back with something – we already have it, it’s pretty incredible. Honestly, I think it’s our most ambitious season to date, but I think it’s also our richest one, in terms of character and backstory and where we’re taking Colter."

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Tracker first premiered on CBS back in 2024 and has drawn a huge audience for the network over the years.

Season 4 hit a new milestone, receiving 13.86 million viewers during its premiere week –– a figure which saw it become the second most-watched show across traditional TV and streaming platforms.

Tracker season 4 is expected to stream in the UK on Disney+ from 25 November 2026. Seasons 1-3 are streaming now. You can sign up to Disney+ from £4.99 a month.

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Authors

Molly Moss is a Trends Writer for Radio Times, covering the latest trends across TV, film and more. She has an MA in Newspaper Journalism and has previously written for publications including The Guardian, The Times and The Sun Online.