Despite a few setbacks, Barbara is determined to make AbbottElementary's first-ever holiday show a success.Meanwhile, Jacob's brother arrives for his visit earlierthan planned.
Melissa hosts the Schemmenti family Christmas Eve dinner andgoes to great lengths to make sure everything is perfect.Meanwhile, Janine and Gregory get an unexpected guest.
When a citywide sanitation strike makes its way into thecourthouse, Abby must find a way to solve it; Julianne showsDan how to make the most out of the strike.
The ladies gather to celebrate Racquel and Mel's engagement attheir ballroom-themed party; Jenna organizes a stoop sale tosell clothing items she has collected over the course of hercareer.
Standing in Rossi's abandoned hotel room, Tosh and Calderrealise that he's been conducting his own investigation intowho killed Annie and Bergen. Their fears are verified when MI5agent Rob Harding warns them that if Rossi is seeking justicefor his former protégé, it will be fatal. As they put thepieces of the investigation together, the detectives uncover afailed MI5 operation in London which surprisingly leads them toa local family, as a chilling showdown unravels.At the kirk,Alan organizes a memorial for Annie. However, the mood quicklysours when an unwanted face arrives to pay their respects,unsettling the family.In the aftermath of the confrontation,Tosh and Calder interview Rossi, who gives them his reasoningand motivation for going after Annie's killer – a tale fullof guilt and revenge.
The team is called in to track down a serial killer after thebodies of multiple women with the same physical description arefound scattered across the city. Meanwhile, Maggie juggles herroles as a guardian to Ella and an FBI agent.