Antonio Raul Corbo

Harley and Ellie host a winter break camp for the neighbours' kids.

Jake runs into Jess Day, who is visiting from Los Angeles, and enlists her help on a case. Holt looks for ways to improve morale. Amy investigates Rosa's long breaks.

When Pimento and Rosa decide to tie the knot, the squad prepares a wedding under Amy's direction. Jake and Gina help Pimento find his grandmother's ruby earrings.

When Jake helps Charles track down his son's favourite toy for Christmas, the pair end up facing off against a Latvian crime ring. At the precinct, the team gets ready for the annual carolling contest against its sworn enemy, the MTA.

Charlie and Jake investigate Nikolaj's family when a visitor from Latvia shows up unexpectedly. Meanwhile, Holt and Amy request famed forensic scientist Dr Yee's help to solve a case for Rosa.

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