The everyday lives of working-class residents of Albert Square, a traditional Victorian square of terrace houses surrounding a park in the East End of London's Walford borough.

School nerd Bill just wants to save the world and to score a date with cheerleader babe Chrissie Schackler. Both become real possibilities when he finds an alcoholic Leprechaun in a beer bottle he was about to recycle. Wacky hijinks ensue as the leprechaun, Lepkey, messes up a few of the wishes. Can Bill fight off school jock Tony Chanuka and marry Chrissie so they can fulfill their dream of opening a clinic?

Aliens return to earth after 10 million years to see what has become of the human experiment they have created only to be disappointed by what they find. After landing they come upon Vernon a homeless bum and decide that earthlings are untidy and figure crossing a vacuum and a human will elimate the problem as well as create a better race of beings. The experiment however goes awry after one of the aliens pee in Vernon's bottle of gin which makes him insanely in love with the vacuum Dusty which was brought to life by the aliens. Things get a tad bit crazy from here as Dusty tries to reproduce and Vernon tries hard to find Dusty.