The English version of Muzzy features the voices of Willie Rushton, Miriam Margolyes, Susan Sheridan, Derek Griffiths, Jack May, and Benjamin Whitrow.
[2] Muzzy, a large extraterrestrial with greenish-blue fur, who eats clocks and other metal and mechanical objects, arrives from outer space to visit Gondoland, which is ruled over by an unnamed King and Queen.
Their daughter is Princess Sylvia; Bob is their gardener; and Corvax is a scientist serving as the King's vizier.
Bob shares a cell with Muzzy, who tells him that he has been incarcerated for eating parking meters.
Furious, Corvax strikes his computer, causing it to malfunction and produce five more duplicates who roam around the palace.
Down on the ground floor, the King notices that the Sylvia duplicates are coming from Corvax's room and decides to investigate.
During the film, a bicycle-riding human named Norman is the star of a series of skits teaching the viewers how to say certain things in different languages.