Jake is attracted to a woman he soon discovers is the attorney for a perp he's after, and Rosa gets Amy to run for union rep to replace Scully.

Jake ruins the precinct's annual beach house getaway when he's pressured into bringing Captain Holt. Gina wants to see "six-drink Amy."

Holt worries Jake is being set up to fail when Wuntch green lights his dream assignment, and Terry hosts a field trip for a magnet school.

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.

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

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.

When famous author DC Parlov receives death threats, Jake and Terry take the case, so that Terry can meet his lifelong hero. Back at the precinct, Gina forces her way into the Boyle clan of cousins in an attempt to choose the location of the annual Boyle family vacation. Meanwhile, Holt's anger peaks when Amy chooses Kevin's side in their argument about a math puzzle.

On Thanksgiving, alcohol provides a temporary fix to Jake and Amy's parental problems, and a pilfered pie awakens the ruthless interrogator in Holt.

After realizing they were suckered into a pyramid scheme, Jake and Charles try to take down the cultish group. Amy deals with an overeager officer.

Jake and Gina attend their 20th high school reunion. Back at the Nine-Nine, Charles helps Rosa with her love life.

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.

Jake finds his authority tested and thunder stolen by a beat-walking Holt amid a manhunt. Amy turns to Rosa for support during a personal crisis.

Amy returns from maternity leave. Jake and Rosa work a difficult case.