Another shakeup at the precinct spells trouble for Jake and Amy, while a string of disappointments sends Holt into a downward spiral.

A smitten Boyle vows to get a fellow foodie out of prison by proving her innocence. Holt's bid to boost cops' public image sparks a backlash.

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

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 Charles whisk Terry away for an ill-fated camping trip, while Holt helps Rosa with a dilemma, and Amy tries to cash in on an old invention.

A lovers' spat leads to trouble on the job as Jake and Amy chase down a new street drug. A parking mishap drives a wedge between Holt and Boyle.

Jake jumps into action when Terry's wife goes into labor at the precinct. Meanwhile, an Internet outage forces the team to go old-school.

Tensions flare as Jake and Rosa work a case with two peculiar Swedish cops. Neil deGrasse Tyson drops by to help Gina prepare for a big test.

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

Boyle tries to recover some sensitive cargo held hostage by his ruthless ex-wife. Amy injures Terry at the worst possible moment.

An illness leaves Jake and Holt quarantined and delusional as they try to solve a cold case. Terry discovers running the precinct is messy work.

Jake and Amy embark on a romantic cruise, only to find an old adversary aboard. Holt braces for a visit from his melodramatic sister.

Amy gears up to meet Jake's mother on his birthday, but the celebration takes an unexpected turn. New body cameras prove embarrassing for Boyle.

Sparks fly when a neighboring precinct moves in with the Nine-Nine. Jake's reunion with an old partner yields an unhappy surprise.

Jake persuades Scully and Hitchcock to take over a drug bust so he can help out with a "celebrity" matter. But neither case is what the team expected.

A cop fresh off an undercover stint with the mob has trouble readjusting to precinct life. Boyle's culinary exploits trigger a janitorial standoff.

Jake and Amy volunteer to house-sit for Holt, with disastrous results. The chemistry between Rosa and Pimento heats up.

An adorable special delivery reminds Terry of an unsolved case that's haunted him for years. With Jake's help, he sets out to finally crack it.

A whirlwind engagement sends the gang scrambling to throw twin bachelor and bachelorette parties. But the night of revelry takes an unexpected turn.

To root out the crooked FBI agent who targeted Pimento, the team stages an elaborate fake funeral and sends Amy on a risky undercover mission.

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.

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.