Yule crack up! The third in the series of National Lampoon's 'Vacations ' films, this sequel concerns the Griswold family's holiday get-together. This time they're trying to have a picture book, old-fashioned Christmastime -- even though all the in-laws are dropping by, including Clark's (Chevy Chase) redneck cousin, Eddie (Randy Quaid). Looks like it's going to be a real holly-jolly holiday -- if they can make it through.