When two students are brutally attacked, 20-Squad contends with a possible honor killing. Meanwhile, Hondo and Nichelle have their first parenting dispute while searching for a suitable daycare.

While Mayan tries to track down the perfect Christmas gift for Chance, George has to settle a feud with Santa that stretches back to George's childhood. Quinten tries to shake Rosie out of her holiday blues.

When the tavern's health insurance is threatened to be canceled, Gabby has a plan. She'll persuade her friend Danny to host his company party at Happy's. The catch is everyone must call Bobbie "Gabby" and Gabby "Bobbie". What could go wrong?

Claire turns to John Grey for comfort as they process difficult news. Ian and Rachel discuss their love and their future. Brianna confronts an intruder at Lallybroch.

Station 42 responds to a false alarm call that escalates into a dangerous hostage situation.

Parker makes a big call on Dominion Creek's ice-filled ground. Rick buys a new pump to fire up Monster Red. Kevin's cut floods, sending him scrambling to find a critical piece of equipment.

Officers in Wichita, Kansas attempt a traffic stop on a green Honda. The driver begins to drive erratically, hitting a curb and disabling his car. He runs and is tased twice, all the while fighting with Officers. A passenger resists and is also tased. A driver refuses to exit his truck during a traffic stop in Escambia County, Florida leading to a brief struggle. In Wichita, Officers stop a woman and find Percocet in her purse. She claims her sister gave it to her for her depression.

Eddie and Badillo try to help a man whose apartment has been taken over by a squatter; Danny and Baez investigate when a student is found dead in her dorm.

Juliette sets out on a dangerous quest to retrieve a suit so she can return home and save her silo. Mechanical plans a meeting with Judge Meadows.

When Eli discovers photos of a mysterious farmhouse, he sets out to find it.

After learning of Seo-yeon's betrayal, Jeong-won cuts their toxic ties. In-ji decides to end everything and invites Tae-seong for a decisive moment.

A detective investigates the unnatural death of an old man.

A portal to the underworld in Texas opens the door to unwelcome guests. A burning secret makes Jentry's first day at Riverfork High School even harder.

After reaching a dead end in the search for Jason's killer, Helen has to fight for her own life, while Sam receives a threat from his former employer.

It's semi-final weekend in the ballroom, and that means double dancing for our remaining couples as they perform two brand new routines.