The Rookie Season 4 - Episode 18 May 2026

In of The Rookie , titled "Backstabbers," the team investigates a deadly train robbery while several characters reach major personal and professional milestones. Key Plot Points

Nyla Harper makes a sudden proposal to James Murray. After some initial apprehension, the couple has a romantic dual proposal and ends the episode with a rooftop wedding reception.

Riding with Tim, Aaron Thorsen struggles to find his unique strength as a cop. Tim eventually identifies Aaron's "superpower" as his compassion and ability to relate to those who have been incarcerated.

Lucy Chen and Tim Bradford share a long-awaited dance at the wedding. Tim also promises to give Lucy more professional recognition by letting her be the primary arresting officer on future cases.