Who is St. Nicholas and how did he become Santa Clause? This episode is about learning just that. If you ever wondered about the history of St. Nick this short summery should do the trick.
Reference : The Real Santa Claus by Marianna Mayer, Who Is Santa Claus by Robin Crichton, Christmas in the Crosshairs by Gerry Bowler, stnicholascenter.org/pages/who-is-st-nicholas/, https://www.whychristmas.com/customs/fatherchristmas.shtml