Tracker Brings Back Mel Day in Season 4 Team Return

Tracker Season 4 brings back Reenie Greene’s assistant Melanie Mel Day and continues Colter Shaw’s missing-person investigations on CBS, with Episode 2 titled Switchback featuring a search for missing hikers after a mother and daughter disappear on the Pacific Divide Trail.

According to showbizjunkies.com, the episode Switchback airs Sunday, October 11, 2026 at 9pm ET/PT and features Erica Hernandez and Sarah Jane Morris as guest stars. Justin Hartley leads the cast as Colter Shaw, with Chris Lee and Fiona Rene returning as Randy and Reenie Greene.

The episode follows Colter as he searches for the missing hikers after discovering they were being stalked. The same report said Travis Donnelly and Ryan O’Nan wrote the episode, while Jeff T. Thomas directed it.

CBS describes Tracker as a series centered on Justin Hartley’s Colter Shaw, a skilled tracker and lone-wolf survivalist who travels across the country searching for missing people and collecting rewards.

"Tracker stars Justin Hartley as Colter Shaw, a skilled tracker and lone-wolf survivalist who crisscrosses the country searching for missing people and collecting rewards. Relying on his sharp instincts, unconventional expertise, and trusted team, Colter tackles dangerous cases, uncovers hidden truths, and brings answers to those with nowhere else to turn," according to CBS.

CBR reported that Mel Day returns in Season 4 after replacing Velma Bruin in Season 3. The character was introduced as Reenie’s assistant after Abby McEnany’s Velma left following Season 2.

Tracker’s fourth season also brings back the full team of Reenie, Randy, and Mel, after previous seasons saw changes among Colter’s support staff. Chris Lee continues as a key team member after taking over technical duties previously handled by Bobby Exley.

The series is based on Jeffrey Deaver’s Colter Shaw book series, including The Never Game. CBR reported that Velma and Teddi Bruin were adapted from characters who helped Colter in the original books.

Showrunner Elwood Reid said the new season will explore Mel’s background, including the unsolved killing of her mother at a rest stop when Mel was 16. CBR reported that the storyline could connect with Colter’s older brother Russell Shaw, played by Jensen Ackles.

Tracker Season 4 began on CBS on Sunday, October 4, 2026, with the premiere episode Safe Harbor, according to CBR. The season continues after production moved to Los Angeles for the first time in the show’s history.