Live Ammo | [s4e19]

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”

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 [S4E19] Live Ammo

While Simone works her connection with Zeke to learn that he was paid to build several sophisticated detonators, the rest of the team tracks a mysterious Russian terrorist. The investigation leads them to a National Guard Armory, where the suspect has already compromised the facility to steal C4 explosives. 'The Rookie' Recap: Season 4, Episode 19 “Simone”

Simone’s backstory is enriched by her relationship with her father, Christopher "Cutty" Clark , a former musician who was wrongfully incarcerated and remains deeply distrustful of law enforcement. Simone argues that the only way to fix a broken system is to be "the good agent" on the inside. The investigation leads them to a National Guard

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.

The episode kicks off with Nolan and Lucy Chen responding to a suspicious call at a building where they discover a bomb with only seconds to spare. The subsequent explosion cripples the area's power, which the authorities soon realize was a calculated move to mask a deeper operation.