It’s Halloween in the Nine-Nine, which can only mean one thing: heist time. This year, the squad members pull out all the stops in their quest to win the new defending title of “Ultimate Detective Slash Genius.” Lines are drawn and plans are made, but there can only be one reigning champion.

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.

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.

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.

A pudgy pooch, handcuffs and various other disasters delay the crowning of the squad's newest Amazing Human/Genius in the annual Halloween Heist.

The squad takes stock of its eight years together and looks toward the future.