Garza’s unit gets roped into a complicated kidnapping case involving a forbidden relationship between two rival drug-dealing gangs. Meanwhile, Simone’s love life is heating up; Laura comes face-to-face with her past, and Carter tries to reconnect with his wife.

When the team splits up to question a suspect’s father, Simone and Laura discover critical information on how their abusive relationship is connected to the crimes. Following this lead, the team heads to Tucson to save the suspect’s newest target. Meanwhile, sparks fly with Laura and her former colleague, Mark Atlas, as they debate the killer’s motive

The crossover starts on The Rookie S05E04 The Choice (I).

Simone and Carter get trapped in the tropics while hunting down a suspect on the run. Simone’s unexpected meet-cute with Dina throws a wrench into Cutty’s love life, and Elena’s high-end fashion splurge cracks open an unsolved murder mystery.

When Simone and Carter go undercover to find an international assassin known as The Reaper, a prisoner seeking bail recognizes Carter and nearly blows his cover. Laura and Brendon trace a lead on The Reaper’s assault rifle while Brendon works to heal his relationship with his father. Meanwhile, Simone’s demanding work schedule puts a strain on her relationship with Dina.

While searching for a missing scientist in the Angeles National Forest, Simone and Carter uncover an eco-terrorist’s plans to detonate dirty bombs across the city. Meanwhile, Brendon taps into his own profiling tactics to find the perfect birthday gift for Laura.