The comic misadventures of the beleaguered Griswold family continue in this latest "Vacation" outing, the third and most successful of the series. This time America's most dedicated dad (Chevy Chase) is determined to stay at home to create "the most fun-filled old fashioned family Christmas ever" -- but life has a particular way of throwing wet logs on Clark Griswold's fire. Look for Emmy and Golden Globe-winner Julia Louis-Dreyfus (TV's "Seinfeld") in a supporting role. Written by John Hughes