Kate est une jeune femme qui prend très souvent des mauvaises décisions. Sa dernière erreur en date est d'avoir accepté un emploi de lutin de Noël dans un grand magasin. Elle va malgré tout y faire la rencontre de Tom, un parfait inconnu qui va bousculer sa vie à jamais.
Los Angeles Police Department (LAPD) Homicide Sergeant Roger Murtaugh (Danny Glover), having recently celebrated his 50th birthday, worries about the troubles of older age. He receives a message from Michael Hunsaker (Tom Atkins), an old Vietnam War friend turned banker who Murtaugh realizes he has not seen in over 12 years. Murtaugh is called to investigate a suicide and learns, to his surprise, that the victim is Hunsaker's daughter, Amanda.
Ned (Bryan Cranston), sa femme Barb (Megan Mullally) et son fils Scotty (Griffin Gluck) vont fêter Noël chez leur fille Stephanie (Zoey Deutch) et son richissime copain Laird (James Franco). Mais Ned n'apprécie pas Laird et lui voue une haine vengeresse, lui refusant la main de sa fille.
Lorsque la directrice générale de Zenotek, Carol Vanstone (Jennifer Aniston) tente de fermer la branche de son frère Clay (T. J. Miller), il doit rassembler ses collègues et organiser une fête de Noël épique dans un effort pour impressionner un client potentiel et conclure une vente qui permettra de sauver leurs emplois.
Connor Mead (Matthew McConaughey) is a famous photographer and confirmed womanizer. He takes a break from his playboy lifestyle to attend his brother's wedding, where he becomes reacquainted with Jenny Perotti (Jennifer Garner), the only girl who ever captured his heart. After Connor delivers a drunken speech at the rehearsal dinner where he says that love isn't real, he's met in the bathroom by the ghost of his uncle Wayne (Michael Douglas), a roué who taught Connor everything he knows about seducing women. Wayne informs Connor that, over the course of the evening, he will be visited by three ghosts who will lead him through his romantic past, present, and future.
The film opens up on Christmas night in Portland, Oregon, where a man appears outside of a decorated house with flowers. On his way to the door, however, he falls into several traps and is left a mess. The culprit of these traps are revealed to be a girl and boy named Lindsey and Kevin Kingston (Aleisha Allen and Philip Daniel Bolden), whose mother has divorced their father. The two are determined to keep her single until the two reconcile.
The film begins with a woman giving birth to a baby. Within a few minutes of his birth, the baby starts saying: "Ho, ho, ho!". Mother Claus calls her son, Frederick, over to meet his new brother, whom she has decided to name Nicholas. Mother Claus lovingly refers to the new baby as her little Saint Nick. During Christmas, when Nick opens his gifts including Fred's, he decides to give them away to orphans which makes Fred angry. Mother Claus advises Fred to be a better person by stating he should be more like his brother; this in turn causes Fred to resent Nick. Feeling isolated, Fred often climbs a tree to confide his problems in a bird. On one occasion, Nick cuts down the tree, saying that now Fred can bring it inside since he liked it so much. However, the birdhouse Fred's confidant lived in is smashed, causing the bird to leave; this causes a temporary rift between Fred and Nick.
After Riverside, Illinois couple Luther (Tim Allen) and Nora Krank (Jamie Lee Curtis) see their daughter, Blair (Julie Gonzalo) depart for a Peace Corps assignment in Peru on the Sunday following Thanksgiving, empty nest syndrome sets in. Luther calculates the couple spent $6,132 during the previous year's holiday season and, not looking forward to celebrating Christmas without their daughter, he suggests they invest the money usually spent on decorations, gifts, and entertainment and treat themselves to a ten-day Caribbean cruise instead. Skeptical at first, Nora finally agrees under the condition that they still give a donation to the church and Children's Hospital. Luther tries to refuse but finally agrees and they begin planning the trip.
On Saturday, December 13, 1941 at 7:01 a.m., a woman goes swimming somewhere on the California coast, only to find a Japanese submarine surfacing beneath her. The submarine crew believes they have arrived in Hollywood, and the vessel submerges while the woman swims to safety.
Set in the fictional town of Thayer, Massachusetts, the story focuses on Meredith Morton (Sarah Jessica Parker), a successful Manhattan executive whose uptight, conservative demeanor is a sharp contrast to that of her boyfriend Everett Stone (Dermot Mulroney) and his liberal and rambunctious family.
Duke brothers Randolph (Ralph Bellamy) and Mortimer (Don Ameche) own a successful commodities brokerage in Philadelphia. Holding opposing views on the issue of nature versus nurture, they make a wager of the "usual amount" and agree to conduct an experiment switching the lives of two people at opposite sides of the social hierarchy and observing the results. They witness an encounter between their managing director—the well-mannered and educated Louis Winthorpe III (Dan Aykroyd), engaged to the Dukes' grand-niece Penelope—and a poor street hustler named Billy Ray Valentine (Eddie Murphy); Valentine is arrested at Winthorpe's insistence because of a suspected robbery attempt. The Dukes decide to use the two men for their experiment.
Samantha Caine (Geena Davis) is a schoolteacher in the small town of Honesdale, Pennsylvania, with her boyfriend Hal (Tom Amandes) and her daughter Caitlin (Yvonne Zima). Eight years earlier, she was found washed ashore on a New Jersey beach, pregnant with Caitlin and totally amnesiac. Having never remembered her real name or any part of her life from before that day, "Samantha" has hired a number of private investigators to try to discover her past, the latest being Mitch Henessey (Samuel L. Jackson). During the Christmas holidays, Samantha is involved in a car accident and suffers a brief concussion, and when she recovers, she finds that she possesses skills with a knife that she cannot explain. Some time later, they are attacked by "One-Eyed Jack" (Joseph McKenna), a convict who escaped from jail after seeing Samantha's face on television, but she demonstrates the prowess to subdue and kill Jack bare-handed. Worried that she may scare Caitlin, Samantha leaves with Mitch, who has been able to find a suitcase purportedly belonging to her, to seek out answers.
Four years after the second film, Scott Calvin/Santa Claus (Tim Allen), and his wife, Carol (Elizabeth Mitchell), are expecting their first child as Christmas Eve approaches. Carol is missing her family, so Scott invites his in-laws, Sylvia and Bud Newman (Ann-Margret and Alan Arkin), up to the North Pole, along with his former wife, Laura (Wendy Crewson), her husband, Neil (Judge Reinhold), and their daughter, Lucy (Liliana Mumy), to keep Mrs. Claus company. Meanwhile, he is summoned to a meeting of the Council of Legendary Figures consisting of Mother Nature (Aisha Tyler), Father Time (Peter Boyle), the Easter Bunny (Jay Thomas), Cupid (Kevin Pollak), the Tooth Fairy (Art LaFleur), and the Sandman (Michael Dorn). Jack Frost (Martin Short) also arrives and is in trouble. He is jealous that he has no holiday or special occasion in his honor, and has been promoting himself during the Christmas season. Mother Nature accuses him of attempting to upstage Santa, and suggests sanctions against him. When Santa says that he is dealing with how to get the in-laws to come without revealing that he is Santa, Jack Frost manages to negotiate a light sentence of community service at the North Pole, helping Santa and the elves put up various Canadian-themed paraphernalia, as Carol's parents believe Scott is a toymaker in Canada. However, Frost's ultimate goal is to trick Santa into renouncing his position, with unknowing help from Curtis who accidentally blurts out what the Escape Clause is and where it is. Thus, Jack Frost sneaks into Santa's hall of snow globes (which contain images of all the Santas throughout world history) and steals a special one containing Santa Claus (aka Scott Calvin) that will invoke the Escape Clause, in which Santa must hold the Globe and say "I wish I'd never been Santa at all" thus sending him back in time and undoing his career as Santa. When Lucy discovers this crime Jack Frost freezes her parents and locks her in a closet. Jack Frost causes trouble for the family that makes Scott think that he must resign to make things better.
Peter Beaupre, Alice Ribbons, Burton Jernigan, and Earl Unger, four internationally wanted criminals working for a North Korean terrorist group, have stolen a US$10 million missile cloaking computer chip. The thieves put it inside a toy remote control car to sneak it past security at San Francisco International Airport. However, a luggage mix-up occurs, causing a woman named Mrs. Hess to inadvertently take the thieves' bag containing the remote control car while returning home to Chicago. The four thieves arrive in Chicago and systematically search every house in Hess's suburban neighborhood to find the chip.
Willie T. Stokes (Billy Bob Thornton) and his dwarfed assistant Marcus (Tony Cox) are professional thieves. Every year, Willie disguises himself as a department store Santa Claus and Marcus disguises himself as an elf in order for both of them to rob shopping malls blind at night. Willie is an alcoholic, a sex addict, and is gradually unable to perform his Santa duties appropriately with children, much to Marcus' dismay. When they are hired at the fictional Saguaro Square Mall in Phoenix, the vulgar remarks made by Willie shock the prudish mall manager Bob Chipeska (John Ritter), who brings it to the attention of security chief Gin Slagel (Bernie Mac).