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).
The Rookie: Feds Season Number: 1 Episode Number: 21 Episode Title: Bloodline (II) Air Date: 2023-04-25