Don and the team are left with little recourse when a former FBI subcontractor takes a team member hostage.
Emma gets poisioned after cutting her finger on some coral and she begins to turn into a white scaled monster! Meanwhile Charlotte thinks Cleo is trying to break her and Lewis apart.
Melinda is at the house of young boy named Riley and as they're hanging Christmas ornaments on the tree, Melinda tries to get him to open up about the strange things he has seen.
When a dying man with a long-standing vendetta puts a hit out on Josef, Mick discovers a secret his best friend has kept from him for over 40 years and the real reason Josef believes Mick and Beth can never work.
A well-known Las Vegas humanitarian is killed for her involvement in a dog-fighting ring, and CSI searches for clues in the strip club murder that Warrick was framed for.
Jack gets attached to Liz's nurturing parents because they provide the love and support he never got from his mom. The staffers get ready for their raunchy holiday party, but Kenneth changes their plans at the last minute.
Ash encounter a young Officer Jenny named Marble and her Luxray. Luxray is unable to use its electric moves, so Ash & Co. set out to help it.
Reluctant to celebrate his birthday, Howard finally succumbs to Vince's plan for a huge party.
Logan and Falacci investigate the execution-style murder of three young college freshmen.
A mysterious man who claims to be a product of Lex's latest project plants a bomb on Chloe and uses her to force Lois to get the truth from Lex.
King Lil Man," was found decapitated, dismembered, and burned in a bathtub. His Latin King's tattoo had been cut from his skin, his head and hands were never found. According to former Assistant U.S. Attorney Richard Zabel, his murderers, fellow Latin King gang members, were "...actually driving around town in a cab with his head because "King Blood," their leader, needed proof of the murder." By the mid-1990's, the New York chapter of the Latin Kings had grown into the most violent and largest street gang every seen in the city. Lead by the murderous "King Blood," they left a path of mayhem that was only brought to an end by "Blood's" 18 guilty verdicts - eight of them for murder. His conviction was largely based on the 20,000 plus letters he wrote detailing the crimes the New York Latin Kings were perpetuating.
In this Christmas-themed episode, Sam and Dean follow the trail of a creature that abducts its victims by using their chimneys. Dean would like to celebrate Christmas like they used to when they were children, but Sam isn't exactly feeling the Christmas spirit.
In Patagonia, Grylls skins a hare, scales a cliff, tracks a puma, drinks dirty water, and crosses the Perito Moreno glacier, a vast frozen labyrinth of ice caves and crevasses.
A child prodigy turned store Santa vanishes and the team wonders if he had criminal connections.
Chode is picked up for shoplifting, but Commander Adam is only using him to get to Darth Bobo. To keep Chode safe, Adam sends him off to a far away planet in the witness protection program. On the planet, four housewives, desperate for sex, all try to compete to get Chode.
Chuck learns the most shocking secret of her life and refuses to forgive Ned. In order to take the Pie Maker's mind off of Chuck, Emerson gets him to solve the mystery of a man killing life insurance agents and hiding them in snow banks. Oscar Vibenius returns to investigate why Chuck has an unique smell. Meanwhile, the aunts' antidepressant-laced pies begin to show some hallucinogenic effects.
Danny is devastated when a young boy he knows is killed in the midst of a bodega robbery. Meanwhile, Lindsay, Stella and Flack investigate the death of a man killed by an exploding cigar that is connected to a joke shop proprietor and another tragedy that occurred years before.
The new sheriff in Fredericksburg, Virginia, requests the BAU's assistance in the investigation of a series of mutilation murders that appear to mimic similar crimes that had occurred over two decades earlier.
The Spies are sent to investigate strange reports of attacks on sushi restaurants! Can Clover and Alex piece together these strange clues, even with Sam leaving them in the middle of the missions? In a b-story, Sam keeps her undercover partnership a secret from Alex and Clover. And it's a personal mission: she has to track a recently-released ex-WHOOP prisoner.
Each designer must create an outfit for a woman who has recently lost weight. The new outfit must incorporate aspects of the now-thin woman's personality, as well as the designer's own style. They are given one of the woman's outfits from before her weight loss as raw material for the new design, $10 to use for additional materials, and one day to complete the challenge.