College friends find their weekend of sex and debauchery ruined when deadly zombie beavers swarm their riverside cabin.

Perennially stoned Cheech and Chong tear through the city of Los Angeles, causing trouble wherever they go. After Cheech loses his job, the two pot enthusiasts head to the welfare offices where Cheech's girlfriend, Donna, works. Instead of collecting unemployment, they find themselves thrown back on the streets, searching for a way to earn new income. But when Cheech's cousin, "Red" Mendoza, arrives, things get even crazier.

A successful physician and devoted family man, John Dolittle seems to have the world by the tail, until a long suppressed talent he possessed as a child, the ability to communicate with animals is suddenly reawakened with a vengeance! Now every creature within squawking distance wants the good doctor's advice, unleashing an outrageous chain of events that turns his world upside down!

When secretive new neighbors move in next door, suburbanite Ray Peterson and his friends let their paranoia get the best of them as they start to suspect the newcomers of evildoings and commence an investigation. But it's hardly how Ray, who much prefers drinking beer, reading his newspaper and watching a ball game on the tube expected to spend his vacation.