After they uncover a secret that could ruin Maria Ostrov's reputation, Elizabeth and President Dalton head to Switzerland to meet with her and use the information as leverage to find a peaceful solution to the escalated conflict with Russia. Also, Dmitri requests to be released from his duties as a spy.

The Clipping Book sends the team to a high-tech research facility, where the researchers have been turned into mindless monsters by some bizarre power source in the center's lab. When they disconnect the artifact, however, they find themselves stuck in a time loop.

Bart's coming of age story a la "Boyhood" chronicles his life from six years old to his time as an accomplished young man. Along the way, his tense relationship with Homer, an overly uncaring version of himself, and Lisa, who overshadows him in every way possible, shape Bart more than he realizes.

Jake, Charles and Gina are involved in a real-life "Die Hard" situation while off-duty on Christmas Eve, and Terry must leave his family celebration to try to save his squad. Meanwhile, Amy tries to prove she's just as tough as Holt and Rosa.

Khloé, determined to move forward with her divorce, hopes to find solace at the Black Jaguar White Tiger Foundation in Mexico City. Meanwhile, Kris complicates matters by keeping in contact with Lamar; at the same time, Kylie looks forward to being treated like an adult after booking an appearance at a club in Montreal, where the legal drinking age is 18.

Jon Taffer helps a failing Detroit strip club looking to stimulate profits before the entire business goes bottoms up.

Christmas is a time for coming together, but for the Lefevers, it's a time of difficult choices. Billy faces an ultimatum to either save his marriage by leaving Rock Springs forever or to stay in the oil game alone while Cody experiences temptation in the form of another man. With the Black Elks land deal slipping away, Annie and Hap consider doing the unthinkable - joining forces to help secure this once-in-a-lifetime oil acquisition. Fearing the fate of his son, AJ enlists Tip to help bring the child to safety. And finally, another father-and-son relationship is pushed to its limits when Hap and Wick finally lay it all out on the table at the Briggs Christmas Eve gathering.

John wakes up in an Odessa basement, imprisoned by an unexpected captor; Malcolm works desperately to find and rescue John.

When Peter's couch is stolen from his front lawn, the guys form a neighborhood watch group. While on duty, Peter sees someone trying to climb into Cleveland's house and he shoots him. Peter is then arrested and charged with a hate crime. Meanwhile, Cleveland is touched when Peter finally admits to the accident, so he takes the fall for the crime and Peter is exonerated.

The MythBusters take on Hollywood's greatest invisible assassins with a trio of tall tales of ingenious booby traps.

Four returning champs battle it out for more money and a spot in the Tournament of Champions finale. First, the chefs must use both their cooking and spelling skills to make an adventurous lunch using only ingredients that begin with "M". Next, the champions are challenged to make their best dish fusing the flavors of Greece and China! Finally, the remaining two chefs will have to create a contemporary American dinner with coconut prepared two ways, using items from only three aisles!

A well respected surgeon is accused of plotting to commit a crime; Ruth suggests that Courtney Paige (Vanessa Williams) hire Jason for business in another state, hoping to remove him from Alicia's life.

Carrie follows a lead.

The Rygaard crew fights Mother Nature as temperatures climb and a massive forest fire is burning just over the mountain. The Papac Crew is having a hard time with what should be the easiest site of the job and Joe is still feeling the effects after his injury. When Greg Chapman pulls an extremely rare double barrel log from the St. John's River, he may have just hit the jackpot. Relying on his trusty Swamp Buggy, the Swampman tries to win over a new client.

The pressure is on as Gail tries to fix a bad situation, and Melissa and Todd try to recover from their relationship troubles.

As the staff attempts to stave off the closure of Billy Barnes, DiDi takes to the picket lines in a last-ditch effort. Jenna tries to weasel her way out of a hastily made offer. Patsy is intrigued by Margueritte's revelation during a secret-sharing session. After a ruse is exposed, Dawn inadvertently sets in motion a chaotic chain of events that seals the fate of the ward.

Cole and Luisa take a serious step forward. Meanwhile, a series of revelations cause Noah to reconsider everything he thought he knew about Alison - and a momentous decision Alison makes may just end their relationship.

Princess Eleanor's new relationship makes waves in and outside of the palace as King Cyrus uses a public ceremony to solidify his image and Queen Helena learns of betrayal.

The terrorists responsible for the bombing of Grand Central Station finally reveal themselves, but instead of answers, more questions remain. While back at Quantico, the recruits receive a well-deserved few days off for the holidays, but not everyone is oh so merry when secrets are revealed and lines and blurred/.

Quinn grows suspicious as Sunny secures his escape from the Fort; The Widow's decisions sets her on collision course with Sunny and M.K.

Thanksgiving arrives, and Paul's neuroses frays dancers nerves. Claire ventures home to see her ailing father and Bryan, who she hasn't seen since their horrifying encounter in New York.

Neil deGrasse Tyson interviews Mars One co-founder Bas Lansdorp and discusses the idea of establishing a permanent human settlement on Mars with co-host Eugene Mirman and guest Mike Massimino.

Mike Tyson, Yung Hee, Pigeon, and Marquess of Queensberry look for a man named Jason B. who wrote a negative review about the Mike Tyson Mysteries group.

Davina and Shea inspire Maura to re-imagine her past; Colton's adopted family visits, leaving Josh facing a touch decision; Ali finds herself more drawn to Leslie; Sarah tries visiting a life coach.

To prove he is a ladies' hero, Puss saves a mermaid from a thief who quickly falls in love with him ... and becomes a big problem.

While Gavin frets about his relationship, Katie is tasked with the tough challenge of training the staff to recognise which fruits are which.

Gavin can't avoid the situation he's in anymore. Valco celebrates 50 years of value.

The Yorkers and the Operational Researchers return in the second quarter-final. They compete to draw together the connections between things which, at first glance, seem utterly random.

Henriette takes the lead in negotiations with her brother King Charles III; Montespan gains power in the court as he wins over Louis' heart. Fabien plans revenge for Beatrice's treasonous acts.

Henriette's health rapidly declines; Claudine works feverishly to save her patient as the palace is put on lock-down; Louis is determined to save his son from the oppressive atmosphere of the court.