Deck the halls with boughs of holly as Nine-Nine precinct for season 4 episode 10 of the police comedy TV series "Brooklyn Nine-Nine" celebrates Christmas. Dubbed as "Captain Latvia," this episode 10 will showcase the squad preparing for a sing-off against another one of their rivals, the Metropolitan Transportation Authority or MTA, in a Christmas caroling competition.

This is not a first that the Nine-Nine team catches itself head-to-head against another squad. The team has previously battled against the Fire Department in season one. In addition, it had a small bit of a dispute with the Post Office in season 2. However, as what they have always done before when dealing with a nemesis, the squad will give all they have to succeed in the yearly caroling competition and reverse the MTA caroling team, TV Guide reported.

In "Brooklyn Nine-Nine" season 4 episode 10, Genevieve and Nikolaj are set to make another appearance in the show's previous episodes. Meanwhile, Charles and his partner Genevieve or Mary Lynn Rajskub adopted a Latvian child named Nikolaj or Antonio Raul Corbo.

Charles portrayed by actor Joe Lo Truglio will be procuring help from Jake (Andy Samberg) to look for his son's favorite toy as Christmas gift. In the midst of their toy hunt, however, the pair finds themselves facing off in contradiction of a Latvian crime ring according to Daily Motion. Jake and Charles is one of the best tandems in the Nine-Nine squad in terms of dealing with extraordinary situations on special occasions.

In Season 3, Jake tried to look a Christmas present for Charles and unintentionally ended up asking help from Charles himself. However, while in the shopping center, both encountered a robbery and hostage-taking situation, alike to Jake's favorite action movie, which starred Bruce Willis, Die Hard. "Brooklyn Nine-Nine" season 4 episode 10 is programmed to air on Tuesday, Dec. 13, on Fox.