“Elf”, “A Christmas Story”, “Die Hard”, and more. All the holiday classics celebrating big milestones. Only ET can take you back to the sets revealing movie secrets. The “Stepmom” tension felt off-screen? And, the TV titan who inspired “Scrooged”. Plus, the actors who almost got the roles including the Taylor Swift ex who nearly starred in “Love Actually”. Then, the “Best Man Holiday” scene that even the actors didn’t know was coming. ET’s with the casts then and now. Plus, the not-so-mean man behind “The Grinch”. ET’s kid correspondents ask Benedict Cumberbatch the hard-hitting questions. And, behind-the-scenes of “The Nightmare Before Christmas”. How director Tim Burton pulled off the holiday masterpiece.