Chevy Chase and Beverly D'Angelo lead the Griswold clan on another vacation adventure---and this time their unsuspecting target is Las Vegas, where Wayne Newton, Siegfried and Roy, and some serious disasters await them. The cherished Vegas traditions of gambling, hustling and go-go dancing are mere child's play to Clark Griswold and family. Randy Quaid, Ethan Embry, Marisol Nichols, Miriam Flynn.