Shaggy and Scooby-Doo Get a Clue - Season 1 Episode 5 -

Dr. Phibes plans on unleashing an evil computer virus into the nation's weapon defense systems, but Uncle Albert gets word of it first. While intercepting the virus, Shaggy and Scooby unknowingly release the virus into their in-house's computer system, which soon takes control of every appliance and utility in the mansion.