Plot: Firing up their hobs this time are driving instructor and practical joker Billy McArthur, glamorous granny Michaela McQuade, outspoken American mum Sarah Lester, and house-proud photocopier service manager Kevin Pawlowski. On the menu is some very rare duck, an impressive display of the Klingon language, and a `posh' approach to dining, featuring tuxedos, cocktail dresses and