When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.
Sherlock uses his trademark deductive reasoning skills to find the killer of a college professor. Meanwhile, Watson gets a call from a former lover who needs her help in disproving hit-and-run charges.
November 24, 1864. The fallout of recent murders and a shocking discovery leaves Corcoran shaken. Morehouse's latest business entanglement takes a dire turn.
When the machine names a New York cabdriver as a person of interest, any of his passengers could be a part of the impending crime.
Michael brokers a deal selling an expensive piece of technology to a ruthless thief, but things become complicated when Sam is dragged in as part of a high stakes robbery. Meanwhile, Madeline goes to Barry to ask for a dangerous favor.
Have you ever wondered how the products you use every day are made? How It's Made leads you through the process of how everyday products, such as apple juice, skateboards, engines, contact lenses, and many more objects are manufactured.
When the party planning committee drops the ball on the annual Christmas party, Dwight gets everyone to celebrate with a traditional Schrute German Christmas. Darryl fears that Jim has forgotten to include him in the new job in Philadelphia. Pete teaches Erin about his favorite movie, Die Hard.
Ron, Diane, and Leslie attend a wood working awards dinner after one of Ron's handcrafted chairs is nominated, but the happy occasion is threatened by the arrival of Tammy II. Meanwhile, Jerry hosts a holiday party at his home with his wife, and some of his friends are shocked to find they were not invited.
After slipping into an unhealthy obsession with computer games, The Gang wrestles to define the difference between the real and the virtual worlds.
Sudden lightning storms are endangering the residents of Berk and it is believed Thor is angry at the island. Mildew leads the superstitious villagers into blaming Toothless, the unholy offspring of lightning and death itself, for the lightning, leaving Hiccup to find the true answers for Thor's sudden destructive anger.
Sam asks a hunter named Martin to keep an eye on Benny without telling Dean. However, when Martin tells Sam and Dean there was a vampire kill and that Benny is responsible, Dean defends his friend.
At the site of a train accident, Peter Mills becomes deeply upset when he observes the dead body of a young victim. Unable to shake his emotional distress about the event, he questions his future as a firefighter. Dawson and Shay save a 6-year-old girl whose mother is abusing her – but their confrontation leads the woman to resort to dire actions. Meanwhile, Severide aggravates his injury while rescuing a heart attack victim and Shay sends Clarice, her married, pregnant ex-girlfriend, back home to her husband.
A murderous Santa wreaks havoc on Briarcliff; Sister Jude faces off with the devil; Arden has a shocking encounter in the death chute.
During an emotional family reunion, an exciting reward challenge enables castaways to join forces with their loved ones.
Melanie is put in an awkward situation with a coworker by her boss; Joy worries about fitting in at college; Victoria is unnerved by her director's request to change her appearance; Elka keeps a secret.
A ritualistic killer is hunted after male bodies are found that have been physically altered. Meanwhile, Reid gets anxious at the prospect of meeting his mystery woman.
Mike helps his brother Rusty move some furniture into the Heck family's garage, only to realize the furniture is stolen; Frankie hopes to land a part-time job in a department store so she can get a discount on Christmas presents.
As Oliver and Helena grow closer, Oliver trains her to be his ally, complete with showing her how to use a crossbow. Diggle disapproves of Oliver sharing his secret with Helena as he's not sure she can be trusted, but Oliver refuses to listen to his concerns. Helena's quest for revenge proves to be too strong for Oliver to handle after she kills the head of the Triad and all hell breaks loose.