Their life is transformed when Sonic the Hedgehog is knocked through their living room wall by Blockhead Bill and Society Max (in his dinosaur state). Their entire house is destroyed by this encounter. They shortly meet the Chaotix Crew, who are on the trail of said dinosaur. Hopefully, Chaotix's insurance covered "damage by dinosaur".
As a note, although the Mudds are from a planet where regions are commonly known, Harold talks like an English Northener, omitting the word "to" in the phrase "going down the pub", and uses the term "dinner-time", where elsewhere it is often known as "lunch".
- Maude and Harold were created to replace Madge and Arthur, whom Nigel Kitching had mistakenly written into "Back in the Special Zone" until Richard Elson pointed out to him that they were actually residents of the Metropolis Zone.