Jake is attracted to a woman he soon discovers is the attorney for a perp he's after, and Rosa gets Amy to run for union rep to replace Scully.

Jake gets jealous over another detective's romantic interest in Amy, and Terry is tempted to accept a job at a private security firm.

While Jake and Holt secretly team up to hunt for a serial killer, Amy and Rosa seek revenge for a sexist assignment.

For their annual Halloween heist, Jake and Holt draft teams and compete to steal a crown. But Amy's divided loyalties leave her out in the cold.

An adorable special delivery reminds Terry of an unsolved case that's haunted him for years. With Jake's help, he sets out to finally crack it.

Jake and Holt continue their new lives in Florida under the Witness Protection Program while Jimmy remains at large, but their identities may be revealed after a video of the pair goes viral.

When famous author DC Parlov receives death threats, Jake and Terry take the case, so that Terry can meet his lifelong hero. Back at the precinct, Gina forces her way into the Boyle clan of cousins in an attempt to choose the location of the annual Boyle family vacation. Meanwhile, Holt's anger peaks when Amy chooses Kevin's side in their argument about a math puzzle.

While looking into a break-in at Holt's mother's house, Jake discovers a secret she’s been keeping from her son. The squad remodels the break room.

As the squad looks for ways to implicate the corrupt Lt. Hawkins, Jake puts his detective skills to work with help from his affable cannibal cellmate.

A promise made to a grieving mother sends Jake spiraling into obsession as he and Rosa comb the scene of a baffling murder for clues.

Adrian Pimento resurfaces with a "Finding Dory"-esque memory problem. Jake tries to keep a secret from Boyle. The squad attends a mandatory HR seminar.

The reappearance of Doug Judy lands Jake in hot water. Terry scrambles to replace Holt's treasured keepsake. The Nine-Nine gets a new vending machine.