Jake's undercover operation ends in a successful sting, until he learns one mobster has gotten away. Jake enlists Charles' help to track him down, and Holt tests the squad with practice drills. But can Charles keep his new secret from Jake?

Holt's old nemesis is in charge of the precinct inspection, Peralta and Jeffords investigate a stabbing before Jeffords goes in for his vasectomy, and Boyle needs a plus-one for his ex-wife's wedding.

The precinct holds a competition while on stand-by for a motorcade, Holt has another run-in with Deputy Chief Wuntch, Boyle needs to get an incriminating videotape from Hitchcock, and Rosa thinks Peralta still has feelings for Santiago.

There's a mole in the precinct and Holt and Jake need to find out who it is before Deputy Chief Madeline Wuntch gets wind of it. Meanwhile, Terry and Rosa visit a "silent" disco to uncover new leads for their new drug task force.

Jake hits it off with a woman at a bar, but later finds out she is the attorney for a perp he is trying to put in jail. Meanwhile, Gina and Charles work to put their relationship behind them, and Amy is pressured into running for union rep.

The precinct goes into lockdown mode on Thanksgiving night, and Jake, who was left in charge, is confident in his ability to keep spirits high and avoid chaos. Amy is less confident, as things spiral out of control.

While attempting to catch a drug dealer, Jake and Charles reluctantly join forces with the nerdy lead investigator at the U.S. Postal Service, Jack Danger. Meanwhile, the rest of the team helps Amy quit smoking.

Jake and Amy have a case early in the morning, so they stay at a hotel overnight. Jake invites Sophia and Amy's boyfriend not knowing that Amy is planning on breaking up with him.

Jake and Boyle go on a stakeout and tensions rise between the two, Rosa shows interest in Holt's nephew, and Terry writes a book for his daughters. Santiago and Gina are displeased when they assume the characters in the book are based on them.

The precinct's annual getaway to Boyle's beach house is ruined when Holt guilts Peralta into inviting him along for the festivities.

Jake goes to great lengths to keep Terry's secret from the rest of the precinct, and Amy gets her chance to partner up with Captain Holt.

Jake tries to impress Sophia's boss. Gina refuses to give her blessing to her mom's engagement. Holt faces a difficult decision.

Jake is heartbroken over Sophia, but his spirits are lifted when the squad is invited to a Homeland Security terrorist training simulation.

Peralta sets out to prove that--for once--he is not the source of Captain Holt's bad mood. Boyle apprehends a notorious bank robber, who turns out to be a harmless-looking old man whom nobody else believes committed the crime.

It's the day of Gina and Charles' parents' wedding, and the whole squad is given a job to fulfill for the ceremony. However, Jake and Amy get sidetracked chasing a criminal, and Terry struggles to officiate the wedding.

Amy and Rosa investigate Jake's claim that somebody is trying to sabotage him and get him fired. Boyle partners up with Hitchcock and Scully to solve a case. Captain Holt refuses to lie with Terry about attending Gina's dance performance.

Jake is badly injured trying to chase a suspect, but he refuses to take time off from the job. Holt and Rosa have an awkward dinner date with their significant others, so they invite Amy and Gina along as well.

Jake is jealous when a detective from another precinct wants to ask Amy out on a date. Linetti and Boyle try to keep Jeffords from taking a job with a private firm, but captain Holt seems to be pushing him out the door.

When Wuntch lets Jake work his dream case, Holt worries she is setting them up to fail. Meanwhile, Terry hopes to get his girls off the wait list for a magnet school by hosting a field trip.

When Jake and Amy go under cover to catch an identity thief, the investigation brings them closer.