After a malfunction and a little bug with the regular materialization program, Odd and Yumi are bugged up, ending up in each others' bodies. Even worse, their atoms start splitting after a while due to being dematerialized, even on Lyoko. The gang has to go to Lyoko and fix the problem before Odd and Yumi disintegrate and disappear forever, but it's not easy when Xana tries to stop them.
The gang tells Caitlin their deepest secrets, and she tells them to her new boyfriend, Dustin. Later, Dustin volunteers to get hypnotized at a hypnosis demonstration and is forced into blurting out all of the gang's secrets, except Caitlin's, to the entire mall.
Joey is having a holiday party at his old apartment. Bobbie is there with her boyfriend.
After Michael and Abby break up, Joey takes him to Tijuana to help him get over it. Alex and Gina want to have some fun and go to a night club.
The contestants are asked to design for a global star… Barbie. The winning designer's outfit will be duplicated for the My Scene Barbie collection. The designers have a budget of $150 and two days to complete their designs.
Jimmy decides to treat Greg and Kim to a weekend vacation, but his "do anything to save a buck" attitude quickly puts a damper on the excitement.
After kidnapping a witness and physically assaulting a priest, Brad is put on trial and enlists the help of Denny and Shirley to bail him out. Meanwhile, Alan's hands are full with his secretary's financial troubles when her credit card company charges ridiculous interest rates putting her $50,000 in debt.
Sean and Christian are perform a mico-liposuction on Joy Kringle, a woman who acts as Mrs. Claus during the Christmas season. During her lipo they find a seventeen year old fetus inside her. Julia is not feeling well. A blood test performed by Sean reveals why. She is pregnant.
Brennan and her team are brought in to identify the body of a man found in a fallout shelter. While cutting into the bones of the man, Zach accidentally releases a deadly fungus, causing the team to be quarantined over Christmas.
With Foreman as House's supervisor, the team must figure out if a woman who cried wolf too many times is really ill.
While filming a reality show on a Marine base, a supermodel dies and the NCIS team must discover who is the model's murderer. They discover a love triangle between the model and three other men, all suspects. Meanwhile, Jenny is disturbed by Gibbs when he doesn't want to attend an award ceremony in his honor.
A "greatest hits" episode with a compilation of Mike's dirtiest jobs involving animals: Pig Farmer, Chick Sexer, Pet Groomer, Horse Breeder at the Babcock Ranch and Ostrich Farmer.
When Cheryl and Dana's mother, Maggie, visits for the holidays, Jim and Cheryl compete with Ryan and Dana for her affection
Craig's big shot at the music industry may prove true after all. Meanwhile, Liberty is trying way too hard, and in her condition, how will it affect her?
The Camdens are in the Christmas spirit in this episode. In a montage with the song ""Rocking Around the Christmas Tree"", Eric is spending time at a retirement home and dancing with the elderly patrons. Ruthie is volunteering at the hospital and gives gifts to kid patients, even her old friend Katelyn (guest star Katelyn Salmont). Lucy is working for Habitat for Humanity again. Annie, Sam, and David are talking and spending time to Sudanese students at a Catholic church. Kevin dresses up as Santa and hands out gifts at the pool hall with Savannah by his side. Kevin takes a lost dog to the kennel, but changes his mind afterwards and gives it to a deserving family.
Emma has a traditional Christmas planned, and Brent is less than enthusiastic about it. Lacey decides to go back to Toronto for Christmas, but bad weather causes some detours in her travel plans; she eventually gets home, but not in the way she expected. Hank gets into the spirit of the season by organizing a gift drive for the unappreciative needy; Wanda is on a gift drive of her own, searching for this year's hot toy.
After Reverend Putty teaches Orel that Jesus will one day return to the earth, he believes that his younger brother, Shapey, is the second coming of Christ. Orel's parents plan for their divorce, and Christmas looks set to be an unhappy one.
Jack realizes that he needs to spend more time with the patrons if he wants Nolita to be more successful. To accomplish this, he hires Becky to be head-chef while he talks to patrons. Meanwhile, Mimi's old loser friend gives Nolita a visit and shows up with her handsome fiance, causing Mimi to become jealous of her. Seth and Teddy go to desperate measures to see if people like pastry or fish.
A sportscaster becomes a full-time dad when his ex-wife decides to accept a job out of the country and his teenage daughter, Breanna, moves in with him.
Mona realizes that she needs to slow down her relationship with Chase after they start spending so much time having sex that it begins to affect her job and other aspects of her life. Dee Dee plans a "legends ball" on behalf of her mother (who is depressed because of her floundering acting career), but finds that none of the invited guests want to attend. Spencer buys a gigantic new truck that soon leaves him financially strapped because he can't afford gas.