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.
Jake and Holt end up on the other side of the interrogation table after being caught plotting an attack on Figgis. Meanwhile, a questionable new captain takes over at the precinct.
The team makes a road trip to Florida to try to help Jake and Holt take down Figgis. With an unforeseen injury and yet another interruption by Sheriff Reynolds, the plan doesn't follow through quite like they all had hoped. In the midst of the chaos, Jake and Amy share an awkward reunion.
As Jake struggles with his first case back at the precinct, he encounters Jess Day, who is visiting New York, and enlists her to help him find his suspect. Meanwhile, Holt researches ways to increase office morale and Amy tries to figure out why Rosa keeps taking such long breaks.
It's Halloween in the Nine-Nine, which can only mean one thing: heist time. This year, the squad members pull out all the stops in their quest to win the new defending title of "Ultimate Detective Slash Genius". Lines are drawn and plans are made, but there can only be one reigning champion.
Pimento and Rosa decide to pick up where they left off and get married, so the whole squad preps a perfect wedding under Amy's careful direction. Pimento enlists Jake and Gina to hunt for his grandmother's ruby earrings for Rosa to wear in the ceremony, but the universe has other plans for them.
At Amy's intricately planned Thanksgiving dinner, Jake goes "full Santiago" (binder and all) in order to impress her father, a former cop. With Jake and Amy's focus elsewhere, Charles is left on turkey duty and Holt helps Pimento cope after learning he can no longer work for the NYPD.
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.
Captain "CJ" is having major problems with a big case, and Jake and Holt find the motivation to help him out. Inside the precinct, war ensues when Terry enforces a green initiative and tells Gina to get rid of her precious space heater, while Rosa and Boyle take a break from the night shift to visit a foot massage parlor.
Charles enlists Jake's help in tracking down his son's favorite toy for Christmas, and the pair finds themselves accidentally facing off against a Latvian criminal ring as a result. Back at the precinct, the team gears up for their annual Christmas carol competition against their sworn enemy: the MTA.
A mass escape of convicts from a prison van in the streets of Brooklyn sends the entire squad on a manhunt. The only key witness? Former NFL running back Marshawn Lynch. Meanwhile, Jake and Amy place a bet on who can bring in the most escaped convicts - and the loser has to move into the winner's apartment.
With only one fugitive still on the loose, Jake enlists a surprising ally.
With the crime rate lowered, Brooklyn will be shutting down one of its precincts - permanently. The Nine-Nine is confident they will be evaluated fairly, until the official auditor turns out to be Amy's ex-boyfriend, Teddy. The whole squad then must band together to try to save the precinct.
Terry's ex replaces Teddy in evaluating the precinct, but Jake and Rosa are distracted by a burglary case that occurred on the set of one of their favorite detective TV shows. As the rest of the Nine-Nine concentrate on the audit (and Terry's past relationship strategies), Jake and Rosa pass time with the series star and producer, who meddle in the case and charm Jake with the glamour of show business.
In what could be their last case as partners, Jake and Charles go to great extremes to apprehend a local bike thief. Terry shockingly isn't in the lead for "Mr. Nine-Nine" (the detective who has solved the most cases), leaving Rosa determined to boost his ego. Meanwhile, Amy spends some precious time with Holt.
Sergeant Jeffords is stopped by a fellow police officer while off-duty in his own neighborhood. When the incident escalates, Terry wants to file an official complaint against him, but Captain Holt has other ideas. Meanwhile, Jake and Amy get a glimpse into the difficulties of parenthood and answer some tough questions when they babysit Terry's kids.
The precinct packs up and heads to the Tri-State Police Officers' annual Cop-Con, which is usually the Nine-Nine's excuse for a big annual party. But the squad's fun is threatened this year when Holt asks them to be on their best behavior.
Amy suddenly vanishes hours before taking the Sergeant Exam, and it's up to Jake and Rosa to find her before it's too late.
Captain Holt's mom seeks support from the precinct after her house is robbed. Meanwhile, Terry, Rosa and Boyle remodel the breakroom and Amy teaches Gina how to change her own car tire.
Jake and Rosa try to earn the respect of their idol, Lieutenant Melanie Hawkins, while Charles, Terry and Gina test different parenting methods to resolve a conflict between Scully and Hitchcock.
Jake and Rosa go undercover with the head of an elite task force to try to crack a massive bank-robbery case.
Jake and Rosa are framed for a crime they didn't commit, it's up to the Nine-Nine to find a way to bust them out.