CHIN's

In order to distract Terry from the stress of his upcoming lieutenant's exam, Jake, Holt and the squad decide to hold the annual Halloween Heist on a new date, Cinco de Mayo.

When Gina returns to the Nine-Nine, Jake and Terry get drawn into her life. Holt learns that Charles’s son, Nikolaj, may be a genius. Rosa copes with an injury.

Jake and the squad must track down a hacker who has infiltrated the Nine-Nine's servers; Rosa deals with relationship issues; Hitchcock and Scully attempt to cook the perfect lasagna.