The battle is on when some angsty teenagers take over Louise, Gene and Tina's usual sledding territory, inciting an epic turf war. Meanwhile, Bob steps in to help Linda, who's in a time crunch to get three scarves knitted before Christmas.

Berlin Station follows up on the evidence Kirsch brought home from his mission, crystallizing their theory about a possible upcoming invasion.

On the planet of Ranskoor Av Kolos, a battlefield, a conflict-scarred survivor, and a deadly reckoning await the Doctor, Ryan, Yaz and Graham.

The Pawtucket Brewery hires new bosses, who decide to change the company's mascot. In an attempt to be crowned the new face of Pawtucket Ale, Peter and Brian go head-to-head.

Elizabeth and Jay work to keep a historic agreement between Serbia and Kosovo from falling apart, after a mass grave is discovered in Serbia dating back to the Kosovo war. Also, Henry deals with a bizarre encounter with Secretary of Defense Gordon Becker.

An elaborate bank heist to steal a single safe deposit box held by Veronica Stephens, a Navy contractor, leads NCIS to investigate her corrupt consulting firm.

Jamie and Claire are surprised when Lord John Grey drops in on Fraser's Ridge with an unexpected traveling companion. When Grey takes ill, Claire must reconcile her personal feelings with her duties as a doctor.

Executive Producers/Writers Toni Graphia and Matthew B. Roberts reveal more about Episode 406: "Blood of My Blood"

With Ray’s work on Anita’s campaign getting in his way, Mac lays all of his cards on the table. Knowing what his friend is facing, Ray must choose where his loyalty lies. Terry and Darryl bring Bunchy home to Boston to get in touch with their roots. Mickey considers the great white north.

Barry and Oliver wake up to find they've swapped bodies, but Team Flash doesn't believe them, so the two heroes travel to Smallville on Earth-38 to get help from Supergirl.

After a failed Black Friday shopping spree, Marge is determined to fix Christmas. However, Homer and the kids surprise Marge with a vacation to a Florida resort.