Synopsis: The Griswolds head off for Las Vegas, as Clark got an extra bonus for developing a food preservative. In the city of fortune, the family ties are once again tested by forces of nature: Ellen finds herself tempted by Wayne Newton, Clark manages to lose all the money the Griswolds own, Rusty, not being 21 years of age yet, hits a lucky streak as Mr. Pappagiorgio and Audrey teams up with Cousin Eddie's daughter Vickie to dance at very interesting night clubs.
Alternate Title(s): National Lampoon's Vegas Vacation