As Jake begins an intense interrogation of a wily dentist suspected of murder, an opera-bound Holt jumps in to assist. Sterling K. Brown guest-stars.

Jake pulls off a major surprise during the squad's annual Halloween heist, a cutthroat competition to claim the coveted title of Amazing Human/Genius.

The squad takes stock of its eight years together and looks toward the future.

When Jake and Amy suffer a wedding day crisis, the Nine-Nine attempts to salvage the nuptials. Holt receives news on his bid for the commissioner job.

Amy takes charge of the Nine-Nine during a citywide blackout, while Jake hits one snag after another as he races to her side.

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.

Jake and the team scour the hospital for a captive Captain Holt, while Amy and Charles book it back to New York to help their friends.

A last-minute Christmas shopping trip lands Jake, Gina and Charles in the middle of a "Die Hard"-like hostage crisis.

After missing their flight home from a funeral in LA, Jake and the squad scramble to get Holt back to New York in time for a big interview.

With help from an old friend of Holt's, the gang sneaks into the FBI to find dirt on the double agent. An inmate puts Charles in an awkward position.

After a threat from Murphy, Holt stashes husband Kevin in a safe house with Jake. Rosa goes undercover at a salon. Scully reveals an actual skill.

When an apparent prank destroys a key piece of evidence, Holt taps the best detective he knows to interrogate the squad and bring the culprit to justice.

Holt turns to Jake for help after a family member goes missing. Rosa battles Amy's ex for a coveted prize. Boyle and Terry team up on a business scheme.

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.

Holt risks his career by refusing to let his greatest nemesis have the last word. Boyle and Terry compete for Jake's tickets to an exclusive kid event.

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

When a prison-van escape sets nine convicts loose in the city, Jake and Amy compete to see who can bring in the most fugitives.

Stuck behind bars, Jake lands in trouble over some delicious contraband. Fellow inmate Rosa keeps Holt and Terry busy with a never-ending to-do list.

Intensely private Rosa shares personal news with the team but wants Jake's help to tell her parents. Cyber Crimes steals the Nine-Nine's bandwidth.

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.

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

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.

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

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.

Charles's convoluted bachelor party plans frustrate Jake, Terry and Holt. At her bachelorette bash, Amy plays a revealing game of "Never Have I Ever."