Weird Science - Season 4 Episode 19
Gary and Wyatt's Bloodsucking Adventure

Gary, Wyatt, and Lisa all decide to go clubbing after hours and become ""creatures of the night."" Lisa turns them all into cool vampires, except the fact that they crave Yoo-Hoo instead of blood. Being vampires gives the guys new powers. They now have the ability to hypnotize people, which they enjoy using on cute women. The night turns out to be not so great when they find themselves with a real group of bloodsucking vampires. Principal Scampi and Chett are determined to stop the vampires and become vampire hunters.