is the 19th episode of the fourth season of The Rookie , famously serving as the first half of a two-part backdoor pilot for the spin-off series, The Rookie: Feds .
As the FBI takes over, the team identifies a potential suspect: Zeke , a brilliant but misguided young man who was once a student of Simone’s when she worked as a guidance counselor. Simone is flown into Los Angeles to assist, but her unconventional methods and loud personality immediately clash with the rigid leadership of Special Agent Matthew Garza . [S4E19] Live Ammo
Officer John Nolan and the Mid-Wilshire team find themselves entangled in a high-stakes terrorism investigation after an explosion at a local power station reveals a larger, more sinister plot. To crack the case, they enlist the help of (played by Niecy Nash-Betts), a New Agent Trainee (NAT) at Quantico who happens to be the oldest trainee in FBI history—drawing a direct parallel to Nolan's own journey as the LAPD's oldest rookie. Plot Summary: A High-Stakes Collaboration is the 19th episode of the fourth season
A central highlight is the bonding between Nolan and Simone. Both characters face skepticism due to their age, but they find common ground in how their life experiences—Simone as a counselor and Nolan as a former construction worker—give them an edge in de-escalating situations and reading people. Officer John Nolan and the Mid-Wilshire team find
Critics generally praised the chemistry between Nathan Fillion and Niecy Nash-Betts, though some viewers felt the episode's focus on a new character made the regular cast feel like "strangers in their own show". Despite some criticism of the "G.I. Jane" portrayal of Bailey Nune during the armory raid, the episode successfully launched the Feds spin-off by establishing Simone as a compassionate, bold, and capable force. 'The Rookie' Recap: Season 4, Episode 19 “Simone”