SANTA CLAUSE: Divorcee Scott Calvin is disgusted to learn that his ex and her husband have tried - and failed - to break it easy to their 6-year-old son Charlie that Santa isn't real. On Christmas Eve, Scott reads The Night Before Christmas... then receives an unexpected visitor on his roof. When he's startled by Scott's calling out and falls, the Santa impersonator disappears, leaving only an 8-reindeer sleigh and a suit with instructions to put it on if he's involved in an accident. Scott does, and is transported around the town dropping gifts through chimneys until he's taken to the North Pole and informed by a group who claim they're elves that he is now Santa. Charlie is proud of his dad's new job, though Scott's convinced it's a dream. Until his hair turns white, his beard refuses to stay shaved, he gains weight inexplicably, even for his sudden love of junk food... Now he's accepted it, there's just one problem: how to keep it secret from his disbelieving family? 

SANTA CLAUSE 2: Scott Calvin has been Santa Claus for the past eight years, and his loyal elves consider him the best Santa ever. But Santa's got problems (he's even mysteriously losing weight) and things quickly go south when he finds out that his son, Charlie, has landed on this year's "naughty" list. Desperate to help his son, Scott heads back home, leaving a substitute Claus to watch over things at the Pole. But when the substitute institutes some strange redefinitions of naughty and nice, putting Christmas at risk, it's up to Scott to return with a new bag of magic to try to save Christmas. 

SANTA CLAUSE 3: Now that Santa and Mrs. Claus A.K.A. Scott Calvin and Carol Calvin have the North Pole running smoothly, the Counsel of Legendary Figures has called an emergency meeting on Christmas Eve! The evil Jack Frost has been making trouble, looking to take over the holiday! So he launches a plan to sabotage the toy factory and compel Scott to invoke the little-known Escape Clause and wish he'd never become Santa!