Danger Mouse travels to outer space to find a custard mite and bring him to Earth after Greenback floods the world in instant custard.

Aliens capture Danger Mouse and Penfold for use in an experiment when they journey to the Bermuda Triangle on the trail of Baron Greenback.

Greenback tells Danger Mouse that he will go straight if Danger Mouse beats him in a duel and if Danger Mouse promises to quit his job if he is the loser.

Washing machines under the control of Greenback threaten to destroy London.

Greenback kidnaps Penfold to get Danger Mouse to bring him four ingredients needed for an evil spell. Danger Mouse meets Count Duckula when one ingredient turns out to be the feather of a vampire duck.