Detective Jake Peralta finds his work scrutinized when new Captain, Ray Holt, takes over at his precinct.
When Jake arrives late for work, Captain Holt decides to shadow him. However, the arrest they make proves complicated. Meanwhile, a psychic friend of Gina's gets inside Charles' head.
With a backlog of unsolved cases, Jake finds himself in a slump. Meanwhile, Amy is put in charge of the Junior Police Program for at risk kids, but her efforts to inspire them fall flat.
Jake meets an attractive Medical Examiner, but their relationship slows down her work, much to his colleagues' annoyance. Meanwhile, Amy desperately tries to impress Holt.
A detective from Major Crimes takes over Jake's nearly solved murder case and steals his thunder.
Jake makes a foolish bet with Holt that he can steal his Medal of Valor before Hallowe'en is over, while Amy is forced to wear a costume while undercover with Charles.
Jake stupidly arrests a male suspect despite having no evidence and only has 48 hours to prove he did it or release him without charge.
Jake is horrified when his hero, Jimmy Brogan, a crime writer, accompanies him on the job, and threatens to quote him in a damning article. Meanwhile, Rosa has to work on her attitude in court.
Jake's favorite pizza place burns down and he is determined to prove the owner was not responsible. Meanwhile, Amy is jealous of Rosa's being offered a promotion, and Terry and Gina have to hire a new IT specialist.
Amy hosts a Thanksgiving dinner at her apartment for everyone at the precinct, but it soon turns into a disaster.
When Holt receives death threats, he surprisingly puts Jake in charge of his security. Meanwhile, Terry undergoes a psych evaluation, and Amy tries to make the perfect holiday card for Holt.
Jake convinces Rosa to make a deal with a criminal in order to catch a car thief, while Charles makes an awkward return to the precinct, and Holt tries to get rid of two puppies.
While Holt holds a celebration for Charles after he is awarded the Medal of Valor, Amy is forced to go on a ridiculous date with Jake after she loses their long running bet.
Jake begins to have second thoughts about putting Terry back in the field for a dangerous undercover assignment, while Rosa and Amy try to help Gina after she is robbed.
Jake is hurt when Amy tells him that she is considering leaving the precinct, while Terry helps Holt redesign the precinct to make everyone more productive.
The officers in the precinct head over to Holt's house to celebrate his birthday, but they wind up making a poor impression on his husband.
Jake tries to keep Charles from going "full Boyle" on his new girlfriend. Meanwhile, Rosa and Amy are reluctant to help an amateur caped crime fighter, and Holt faces competition for the presidency of a police organization he founded.
Due to his crippling debt, Jake faces losing his apartment, and asks Gina for help. Rosa and Charles clash with one of the weekend officers, and Holt and Terry ask their officers to conduct self-evaluations.
Jake tries to set a new record on a training course, Rosa is angry when she does not get an invite to Charles' wedding, and Gina helps Holt overcome his newfound addiction to a game on his smartphone.
Jake tries to convince Charles to stand up to Vivian before the wedding, Terry struggles to stick to a diet after Amy and Gina give up, and Holt tries to get Rosa to make a sincere apology to an officer she offended.
Jake and Terry try to solve an apparently unsolvable case, Amy lies to Holt in order to dodge work and escape for a romantic weekend away, while Gina and Rosa introduce Charles to "Babylon", their secret bathroom.
Jake's latest investigation results in administrative leave, and, ultimately, his firing from the NYPD. Meanwhile, Charles goes into a funk after Vivian breaks up with him before their wedding, and the others try to cheer him up.
Jake's undercover operation ends in a successful sting, until he learns one mobster has gotten away. Jake enlists Charles' help to track him down, and Holt tests the squad with practice drills. But can Charles keep his new secret from Jake?
Holt's old nemesis is in charge of the precinct inspection, Peralta and Jeffords investigate a stabbing before Jeffords goes in for his vasectomy, and Boyle needs a plus-one for his ex-wife's wedding.
The precinct holds a competition while on stand-by for a motorcade, Holt has another run-in with Deputy Chief Wuntch, Boyle needs to get an incriminating videotape from Hitchcock, and Rios thinks Peralta still has feelings for Santiago.
The Peralta/Holt annual Halloween bet continues when Jake challenges the Captain that he can steal his watch before midnight. Meanwhile, Gina is upset that her dance team, Floorgasm, kicks ...
There's a mole in the precinct and Holt and Jake need to find out who it is before Deputy Chief Madeline Wuntch gets wind of it. Meanwhile, Terry and Rosa visit a "silent" disco to uncover new leads for their new drug task force.
Jake hits it off with a woman at a bar, but later finds out she is the attorney for a perp he is trying to put in jail. Meanwhile, Gina and Charles work to put their relationship behind them, and Amy is pressured into running for union rep.
The precinct goes into lockdown mode on Thanksgiving night, and Jake, who was left in charge, is confident in his ability to keep spirits high and avoid chaos. Amy is less confident, as things spiral out of control.
While attempting to catch a drug dealer, Jake and Charles reluctantly join forces with the nerdy lead investigator at the U.S. Postal Service, Jack Danger. Meanwhile, the rest of the team helps Amy quit smoking.
Jake and Amy have a case early in the morning, so they stay at a hotel overnight. Jake invites Sophia and Amy's boyfriend not knowing that Amy is planing on breaking up with him.
The Pontiac Bandit aka Doug Judy, is back in custody, after jamming up Jake and Rosa in his previous encounter with them. But when Rosa discovers that Judy knows the whereabouts of the "...
Jake and Boyle go on a stakeout, Rosa shows interest in Holt's nephew, and Terry writes a book for his daughters.
The precinct's annual getaway to Boyle's beach house is ruined when Holt guilts Peralta into inviting him along for the festivities.
Jake goes to great lengths to keep Terry's secret from the rest of the precinct, and Amy gets her chance to partner up with captain Holt.
Jake to tries to impress Sophia's boss. Gina refuses to give her blessing to her mom's engagement. Holt faces a difficult decision.
Jake is heartbroken over Sophia, but his spirits are lifted when the squad is invited to a Homeland Security terrorist training simulation.
Peralta sets out to prove that--for once--he is not the source of captain Holt's bad mood. Boyle apprehends a notorious bank robber, who turns out to a harmless-looking old man whom nobody else believes committed the crime.
It's the day of Gina and Charles' parents' wedding, and the whole squad is given a job to fulfill for the ceremony. However, Jake and Amy get sidetracked chasing a criminal, and Terry struggles to officiate the wedding.
Jake's mainly absentee father, Roger (guest star Bradley Whitford), comes to town to spend some time with his son. Jake can't wait to see him, but Charles is skeptical of Roger's intentions...
Amy and Rosa investigate Jake's claim that somebody is trying to sabotage him and get him fired. Boyle partners up with Hitchcock and Scully to solve a case. Captain Holt refuses to lie with Terry about attending Gina's dance performance.
Jake is jealous when a detective from another precinct wants to ask Amy out on a date. Linetti and Boyle try to keep Jeffords from taking a job with a private firm, but captain Holt seems to be pushing him out the door.
When Wuntch lets Jake work his dream case, Holt worries she is setting them up to fail. Meanwhile, Terry hopes to get his girls off the wait list for a magnet school by hosting a field trip.
When Jake and Amy go under cover to catch an identity thief, the investigation brings them closer.
Jake thinks Boyle might have met his soul-mate in Genevieve, an art gallery owner, and he tries to help set them up. Meanwhile, Rosa deals with inter-precinct theft and Holt seeks Amy's help with an image campaign.
When investigating a serial killer, Jake enlists Holt's help in an attempt to solve the case off the radar. At the precinct, Rosa and Amy are forced to deal with demands from an old adversary and Terry discovers a new obsession.
Jake and Charles convince Terry to take a weekend camping trip as a much needed "babymoon," but they soon realize it might not be the idealistic weekend for which they had hoped. Meanwhile ...
Charles and Genevieve want to take their relationship to a new level, but his ex-wife, Eleanor, steamrolls their plans. Meanwhile, Amy asks Terry to write a recommendation letter with ...
On his birthday, Jake brings Amy to meet his mother, but a surprise appearance by his dad throws a wrench in his special day. Meanwhile, Rosa and Charles struggle with a new mandate ...
Terry enlists Jake's help in solving a twenty year old case which his old precinct never let him forget, Charles allows Adrian Pimento to stay at his place and soon regrets it, while Amy, Rosa and Holt attend a class together.
Jake and Holt adjust to their new lives in Florida under the Witness Protection Program while Jimmy "The Butcher" Figgis remains on the loose.
Jake and Holt plan their attack on Jimmy "The Butcher" Figgis, only to end up on the other side of the interrogation table.
The team goes to Florida to help Jake and Holt take down Jimmy Figgis, but their plan falls through due to an unexpected injury and another interruption from Sheriff Reynolds.
Jake enlists the help of Jess Day, who's visiting New York, with his first case back at the precinct. In the meantime, Holt tries to increase office morale and Amy wants to know why Rosa is taking such long breaks.
The squad competes in the annual Halloween heist to win the title of Ultimate Detective Slash Genius.
The Nine-Nine throws a wedding for Pimento and Rosa.
Amy's father, a former cop, comes to Thanksgiving dinner and Jake tries to impress him, leaving Charles on turkey duty. In the meantime, Holt helps Pimento come to terms with the fact that he can no longer be a police officer.
Terry meets his lifelong hero, a famous author who's received death threats. In other events, Gina tries to choose the location of the Boyle family vacation and Amy sides with Kevin in his argument with Holt over a math puzzle.
Jake and Holt help Captain CJ with a big case.
Jake and Charles face off against a Latvian criminal ring when Jake helps Charles find his son's favorite toy for Christmas.
The squad goes on a manhunt for a group of convicts who've escaped from a prison van on the streets of Brooklyn. When one fugitive is still loose, Jake gains a surprising ally.