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?
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 Rios thinks Peralta still has feelings for Santiago.
The Peralta/Holt annual Halloween bet continues when Jake challenges the Captain that he can steal his watch before midnight. Meanwhile, Gina is upset that her dance team, Floorgasm, kicks her off the squad and Terry confronts her about her bad attitude.
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.
The Pontiac Bandit aka Doug Judy, is back in custody, after jamming up Jake and Rosa in his previous encounter with them. But when Rosa discovers that Judy knows the whereabouts of the "Giggle Pig" drug leader, Capt. Holt offers the perp a plea deal to help track down the drug kingpin. Meanwhile, Gina and Boyle are nervous that their parents might be getting too close, and Santiago makes Holt a Christmas gift against his wishes.
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 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.
Jake's mainly absentee father, Roger (guest star Bradley Whitford), comes to town to spend some time with his son. Jake can't wait to see him, but Charles is skeptical of Roger's intentions. Meanwhile, Holt tasks Amy, Terry, Gina and Rosa with an impossible brain teaser in exchange for Beyoncé tickets.
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 a 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.