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

Mayhem and double-crossing overtake the squad as they try to distract Terry from his lieutenant's exam by kicking off the Halloween Heist on a new day.

To right a wrong, the Nine-Nine teams up with the worst of the worst of the NYPD. Terry sinks into deep denial about his future.

Jake and Charles investigate a case of Hitchcock and Scully's from the 1980s. Meanwhile, Amy's uniformed officers and Terry's detectives fight over limited resources.

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.

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.

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.

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.

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.

A promise made to a grieving mother sends Jake spiraling into obsession as he and Rosa comb the scene of a baffling murder for clues.

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.

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.

An unexpected third wheel puts a damper on Jake and Amy's tropical honeymoon. Back at the Nine-Nine, Terry experiences a crisis of confidence.

Holt and Jake become suspicious of a new Nine-Nine employee. Amy goes full-on Marie Kondo to declutter the bullpen.

Jake and Boyle hunt for a serial killer under the watchful eye of Commissioner Kelly. Terry learns that more money does indeed bring more problems.

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

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.

After getting stopped and mistreated by an unfamiliar cop, Terry receives some disappointing advice from Holt about how to handle the profiling.

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.

As Hitchcock and Scully microwave a lasagna for exactly 21 minutes and 30 seconds, the squad races against the clock to catch a hacker.

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.