Catherine is back in town and has no idea what’s been going on between Jackson and Maggie, while her relationship with Richard has become distant. Owen and Amelia treat a woman who fell in the basement and quickly realize that there is more to the story; and Maggie is shocked to learn about some of Richard’s relatives who are seeking help.

Gabriel is first chair on a case defending a teacher involved in a school shooting, and this case hits particularly close to home for both Gabriel and Annalise. Annalise attempts to discourage Tegan from her new quest to right a wrong. Oliver makes a shocking confession.

The SVU joins an undercover task force in busting a human trafficking ring.

Sam and Dean investigate the mysterious death of a girl and the disappearance of another.

Amy, Jonah and Glenn hatch a plan to make Amy look like a tough boss after she loses face in front of the district manager. Dina recruits Mateo to help her run Cloud 9’s shoplifter rehabilitation program – with a few of Dina’s personal tweaks.

With one day left in the year, Simone reveals that she's suspicious about the neighborhood -- and her investigation could derail the entire experiment.

Jimmy welcomes actor Matthew McConaughey, home improvement experts Chip & Joanna Gaines, and a musical performance by Gucci Mane.