In Season 4, Episode 8, titled " Hit and Run ," the LAPD squad is thrust into a high-stakes hunt for a domestic terrorist while navigating deeply personal family conflicts. Originally aired on December 5, 2021 , the episode is notable for its creative use of "found footage" styles—utilizing body cams, cell phones, and surveillance video to heighten the intensity of the search. The Terrorist Threat

The primary police action follows the pursuit of , a "sovereign citizen" radicalized into a domestic terrorist plot.

: She grapples with a custody battle after her ex-husband decides to move out of state with their daughter. Nyla struggles with feelings of guilt over her past absence in her daughter's life, though Aaron Thorsen encourages her to fight for her rights.

Parallel to the city-wide threat, the characters face internal and domestic struggles:

: The couple continues to clash over Wesley’s dangerous deal with the crime boss Elijah Stone. "The Rookie" Hit and Run (TV Episode 2021) - IMDb