Ahead of Bailey's return home, John looks for clues to locate Jason Wyler. Then, Tim and Lucy swap rookies; a friendly face resurfaces at the station, and Wesley feels unsettled over Angela.

John, Lucy and Angela investigate the suspicious stabbing of three teenage girls. Back at the station, the team experiences technical difficulties while managing a group of prisoners and a wild animal.

An April Fools' prank on LAPD’s social media leads to citywide chaos. Meanwhile, John's T.O. skills are tested, Wesley is assigned a challenging case, and Tim and Lucy play a joke on the team.