A storm strikes Tree Hill, putting everyone's life in danger.

Finn tries to bring a little holiday cheer to McKinley High, and Artie discovers that Brittany still believes in Santa. Meanwhile, the teachers pick their Secret Santas, and one manipulative coach rigs the gift-giving in her favor.

After George is mistaken as a hero for thwarting a robbery that Jim was responsible for stopping, tempers flare between the two friends when George thinks Jim is jealous of the attention he's receiving, and Jim feels that George is taking credit for something he didn't do and hogging the limelight.

The final four contestants leave the ranch and transition back to life at home, showing off their new slimmer selves to family and friends and facing the temptations and challenges of everyday life. Six weeks later, they return to the ranch to run 26.2 miles, cheered on by loved ones. The winner breaks a 'Biggest Loser' marathon record. Then a final weigh-in determines who the two definite finalists will be - and which two contestants fall below the dreaded yellow line, leaving America to vote which one will be the third finalist to compete for the grand prize of $250,000. Alison Sweeney hosts, and trainers Bob Harper and Jillian Michaels also star.

Carter's plans to visit family for the holidays are thwarted when the town is trapped by a electromagnetic shield.

Mike works on a mobile meat-processing truck and visits a dump to learn how to deal with seagulls.

Paul tries to get Jesse to open up about a recent transgression and his relationship with his father.

Pete and Myka hunt down a malevolent artifact-wielding Santa Claus and come to the aid of a businessman. Meanwhile, Artie reunited with his estranged father Isadore after 30 years.

Lux and Tasha are forced to deal with the fallout of their recent actions and the potential outcome could change the course of both their lives. As a result, Lux can no longer hide her past from Cate and Baze.

When Jimmy was a kid, every year Burt would get the season's hottest toy and sell them off for money, leaving Jimmy disappointed and without the coolest toys. This year, Burt lets Jimmy in on his scheme, but Jimmy makes him promise to save one toy for Hope. Meanwhile, Virginia signs up the family to participate in the church's living nativity scene in order to gain respect from the church members.

Paul contemplates the future of his own therapy and his practice.

Thinking their own lives are more difficult than each other's, Steve and Emmy walk in each other shoes, leaving Steve in charge of Puddle and Emmy socializing the night away to impress a powerful magazine editor.

Longford and Mahajan's investigation of the skeletal remains of a young Caucasian woman and an African American man found in an underground fallout shelter point to a couple missing since 1967. Longford's estranged father, a former cop, offers him a crucial piece of information. Fitch, Washington, Stone and Sanchez are assigned the case of a pregnant, undocumented immigrant who has been viciously murdered.

Seth Green

Conan welcomes actor and now author Rainn Wilson, female skydiver Roberta Mancino and musical guest Christina Perri.

Julie Nixon Eisenhower & David Eisenhower

Johnny Depp, Ra Ra Riot, George Benson

Helen Mirren, Aaron Eckhart, Keith Urban

Kevin is in Amersham for a second update on a project taken on by Deborah and architect Andrew. Their venture involved designing an 'invisible' house that blended in with the surrounding reservoirs.

Andrew Tate and Deborah Mills discovered a site with a dilapidated, 100 foot tall water tower on it ten years ago and they saw it as the perfect location to build a family home and convert the old water tower into a seven-storey bedroom wing. Kevin returns once again to see how their lives are now.

Alan Sugar challenges the remaining candidates to set up their London tour company and provide open-top bus excursions for tourists. The budding entrepreneurs also have to map out walking routes to show visitors a lesser known side of the capital, and bid for a potentially lucrative deal with a travel agency.