Simone Clark sets her sights on joining Matthew Garza’s newly formed special unit as they investigate the murder of a federal engineer. Simone and Cutty’s relationship is tested as their opposing opinions about law enforcement come to a head.

A mysterious caller threatens to reveal a leaked list of undercover FBI agents if a prisoner is not released; Simone enlists John Nolan to help her remodel Cutty’s garage into a living space.

The crossover starts on The Rookie S05E10 The List (I).

The FBI takes on a case from LAPD involving a serial murderer who has been leaving limbs across state lines. After the team follows a lead from Antoinette and Elena's forensic breakthroughs, the killer retaliates against Laura.

The crossover starts on The Rookie S05E21 Going Under (I).