In this 3rd Lampoon outing, Clark is determined to have an old fashioned Christmas. The disasters begin when his crude cousin from Kansas arrives unannounced.

A silent screen comedy team is unwittingly hired by a Mexican village to help them get rid of terrorizing bandits.

When Clark Griswold (Chase) puts his mind to something, we soon realize he hasn't got one. Still, nothing stops him when the vacation bug hits. This time, he's chosen Las Vegas, the new family entertainment capital of America!