"The Santa Clause" is a 1994 holiday film starring Tim Allen as Scott Calvin, a man who accidentally causes Santa Claus to fall from his roof on Christmas Eve. After the incident, Scott discovers that he must take on the role of Santa, which includes delivering presents and embodying the spirit of Christmas. As Scott transforms into Santa, he faces challenges in his personal life, particularly with his ex-wife and son, Charlie. The film explores themes of belief, family, and the magic of Christmas, ultimately showing how Scott embraces his new identity and responsibilities.