Jeff, who has been diagnosed with AIDS, decides to get his revenge on the world by attacking people with hypodermic needles filled with his blood.
Danny Warren is a former minor-league shortstop that becomes a narc to uncover drug dealing in this situation comedy. Investigating at a high-school adult-education class, he falls for the tempting teacher. He joins a colorful group of characters that includes ex-cons, illegal aliens, and brain-dead baby boomers that cause more trouble than their younger counterparts. Swimming classes and wine tastings serve as background for a series of comic catastrophes.
Secretly engineered and blasted into space by government scientists, a vile monster crash-lands back on Earth and begins killing everyone it encounters. As the death toll rises, veteran cop McLemore bravely steps forward to crush the scary creature.
Microbes are brought back to earth via a space probe from Venus. A scientist is using them in experiments on aging, but dies before the work is finished. His assistant approaches an aging actress who is being passed by for the lead roles, and she injects the serum hoping to become young again. When the actress is still passed up for the plum roles, the alien bacterium transforms her into a hideous bug-like alien resulting in a predictable attrition problem amongst her detractors.