Even after Commissioner Podalski shuts down Jake's investigation into a philanthropic civic leader, Jake continues anyway by turning to Amy and Captain Holt for help in gathering evidence. Meanwhile, Charles' problems with his fiancée cause Gina to find a way to cheer him up.
On his weekend off and with Terry's help, Jake tries to crack a cold case that everyone thinks is unsolvable. Meanwhile, Amy plans a romantic trip with Teddy, and Charles learns a secret from Gina and Rosa.
Charles asks Jake to be the best man at his wedding. Meanwhile, Terry, Amy and Gina start a new extreme diet, and Captain Holt assists Rosa in making a sincere apology.
The precinct attends a mandatory training course where Amy runs into an officer she used to date. Meanwhile, Captain Holt is unable to quit playing a game on his phone, and Rosa is angry at Charles for not inviting her to his wedding.
Jake risks losing his apartment due to crushing debt unless Gina can help out. Meanwhile, Captain Holt and Terry conduct performance reviews, and Rosa and Charles run into a weekend squad officer.
Charles pursues a new romance, but Jake steps in to keep him from moving too fast. Meanwhile, Rosa and Amy deal with a costumed crime fighter, and Captain Holt goes up against a new opponent.
Invited to Captain Holt's house to celebrate his birthday, the precinct ends up making a bad first impression on his husband.
Jake is shocked to learn that Amy might leave the Nine-Nine to work at the Special Crimes unit with his nemesis "The Vulture." Meanwhile, Terry and Captain Holt attempt to make the workplace more efficient.
Terry returns to the field with Jake trying to keep the sergeant's emotions under control. Meanwhile, Amy and Rosa investigate a case at Gina's apartment.
Jake and Amy finally reach the end of their ongoing bet about who can make more arrests. Meanwhile, Charles reveals what he truly thinks about his colleagues while under the influence of pain medication.
One of Rosa's perps has information on an elusive car thief that Jake has been tracking for years. Meanwhile, the precinct tries to accommodate a scooter-bound Charles, and Captain Holt attempts to find a home for two puppies.
Jake is put in charge of Captain Holt's security after he receives death threats. Meanwhile, Amy tries to get the precinct to take a Christmas photo, and Terry goes in for his final psych evaluation.
Amy's plans to host a Thanksgiving dinner at the precinct go awry when Captain Holt and Jake leave to catch a perp.
After Sal's Pizza burns down, Jake sets out to prove the fire marshal wrong when the owner is accused of being the prime suspect. Meanwhile, at the precinct, a computer virus publishes everyone's browser history.
Jake gets the chance to spend the day with his hero, a former crime reporter, but later makes drunken comments about Captain Holt and the precinct considered "on the record." Meanwhile, Terry and Charles coach Rosa how to properly act on the witness stand.
After making an arrest without much proof, Jake has just 48 hours to collect enough evidence before the perp is released. While his co-workers are forced to spend their weekend helping out, Charles judges a pie contest between Rosa and Gina, and the Captain aids Terry in a problem with his brother-in-law.moreless
Jake tries to steal Captain Holt's Medal of Valor. Meanwhile, Amy tries to get over her hatred of Halloween, and Terry tries to learn more about Rosa's past.
Jake tries to exact revenge on another unit for stealing his case. Meanwhile, Captain Holt and Gina take Terry to a shooting range to help him get re-certified to carry a gun.
After meeting at a crime scene, Jake starts sneaking around with an attractive medical examiner, which holds up the autopsy report and frustrates the team. Meanwhile, Amy uses Terry's hidden artistic abilities on a purse-snatching case and also desperately tries to get on Captain Holt's good side.
Jake tries to get out of a slump. Meanwhile, the Captain asks Amy to speak to at-risk youth, and she gets some much needed help from Rosa and Gina. Elsewhere in the precinct, Charles assists Terry in secretly building a dollhouse for his daughters' birthdays.
Jake is late for work and gets assigned to a low-level case. Meanwhile, an encounter with a psychic messes with Charles's head.
Detective Jake Peralta's life changes when his precinct gets a new Captain. Meanwhile, Charles makes multiple attempts to ask Rosa out on a movie date.