When tightly wound Capt. Holt takes over the precinct, carefree Det. Jake Peralta and his dysfunctional coworkers' lives get demanding.

Jake is assigned a lowly graffiti case as punishment for being late to roll call.

Jake's unsolved cases pile up and the other detectives fear that his losing streak will rub off on them, while Amy must run an at-risk youth program.

The team turns on Jake for delaying an autopsy report by flirting with an attractive medical examiner, who turns out to be more than he bargained for.

A Major Crimes detective known as "The Vulture" takes over Jake's nearly solved case and steals his thunder, prompting revenge.

Halloween-hating Amy is anything but festive when she has to don a costume and hit the streets with Charles on busy Halloween night.

After making an arrest with too little proof, Jake has 48 hours to get evidence or the perp will go free, forcing the team to work over the weekend.

Jake's dream day with his hero, a former crime reporter, turns nightmarish when his comments about Holt and the precinct go "on the record."

When Jake's favorite pizzeria is burned down and the fire marshal suspects the owner, Jake steps outside his jurisdiction to catch the real arsonist.

Amy hosts Thanksgiving dinner for the precinct in an effort to get Holt to be her mentor, but Holt and Jake leave early and the rest hate her cooking.

When Capt. Holt receives death threats, Jake is placed on his protective detail and revels in the chance to boss his boss around.

Jake and Rosa hunt an infamous car thief, Holt tries to find a home for puppies and the rest of the precinct tries to accommodate a wounded Charles.

After Jake and Amy's bet about who can make more arrests is finally settled, the two go on a stakeout where Jake reevaluates their relationship.

On his first task back in the field, Terry takes advice from Jake on controlling his emotions to infiltrate and bust a steroid trafficking ring.

While investigating a string of hotel robberies together, Jake discovers that Amy may transfer to the Major Crimes unit and work with "The Vulture."

At Capt. Holt's birthday party, Jake, Amy and the other officers try to make a good impression on Holt's husband but fail miserably.

To stop Detective Boyle from getting too clingy, or "Full Boyle," with his new girlfriend, Jake goes on their date, but things don't go as planned.

When Jake's building goes co-op and he must pay nearly a half million dollars to keep his apartment, he desperately seeks Gina's help.

At Tactical Village, where the precinct competes against other precincts in paintball exercises, Jake gets jealous when Amy runs into an old flame.

When Charles makes Jake his best man, it means cake tasting, choosing flowers and convincing fiancée Vivian that Charles doesn't want to move.

On a solving streak, Jake decides to spend his weekend off with Sgt. Terry trying to crack a cold case that no one thinks can be solved.

Jake risks suspension when the commissioner shuts down his investigation of a civic leader and he gets Amy and Holt to help him work the case anyway.

When Jake discovers that a mobster escaped his otherwise successful sting, he enlists Charles to help track him down, which worries Gina.

Holt's nemesis heads the precinct inspection, while Terry readies for his vasectomy and Charles needs a date for his ex-wife's engagement party.

When a motorcade detail is delayed, it leads to a wacky competition, and Charles must get an incriminating videotape from Hitchcock.

For their annual Halloween wager, Jake bets Holt that he can steal his watch before midnight, and Gina gets kicked off her dance squad, Floorgasm.

Holt and Jake search for a mole in the precinct, and Terry and Rosa visit a silent disco to find "Giggle Pig" dealers.

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.

When the precinct goes into lockdown on Thanksgiving night, it's up to Jake to keep morale high, even as things spiral out of control.

To catch a drug dealer, Jake and Charles must team up with an incompetent Postal Service investigator. Meanwhile, the team helps Amy quit smoking.

When Jake and Amy have to stay overnight at a hotel for a case, Jake invites Sophia and Amy's boyfriend Teddy over, but the move backfires.

Jake and Rosa catch the Pontiac Bandit, who could lead them to the Giggle Pig kingpin. Charles and Gina worry about their parents getting close.

Jake and Charles go on a stakeout that lasts way too long, and Terry writes a book for his daughters that angers Amy and Gina.

Jake ruins the precinct's annual beach house getaway when he's pressured into bringing Captain Holt. Gina wants to see "six-drink Amy."

Jake has to go to great lengths to keep a secret about Terry from the rest of the precinct, and Amy finally gets to partner up with Captain Holt.

When his relationship with Sophia gets in the way of her work, Jake tries to help, Wuntch needs Holt's help, and Charles wants Gina's blessing.

The Nine-Nine is invited to a terrorist training drill with Homeland Security, but the precinct's role as hostages doesn't go over so well.

Jake is determined to prove that he's not to blame for Holt's bad mood, and when Charles catches a notorious bank robber, nobody believes him.

It's wedding day for Charles and Gina's parents, and everyone in the squad is given duties; but Jake and Gina get distracted, and Terry has troubles.

When Jake's absentee father visits, Charles suspects he's up to no good. Holt throws down a brain twister challenge.

Holt makes Amy and Rosa investigate Jake's bad luck, but he also insults Gina. Charles partners with Hitchcock and Scully.

Terry forces Jake to take time off after he's injured chasing a perp, and Holt and Rosa go on an awkward double date with their significant others.

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

Holt worries Jake is being set up to fail when Wuntch green lights his dream assignment, and Terry hosts a field trip for a magnet school.

Jake and Amy go undercover to catch an infamous identity thief, and the squad is rocked by an unexpected farewell.