The boys come home to find the house in a real state. The builders have been in, and everywhere they look, there's mess. On top of this, there's a mouse in the house, and mum is hiding in the shed.
Dad - who's clueless in the kitchen - is left in charge of dinner ("I might as well be boiling a table").
But when Jim pops round to see if he can help around the house, something quite terrible happens to him, and mum is forced - out of guilt - to ask Jim over for dinner. This is Jim's happiest moment ever - finally, his first ever Friday night dinner with the Goodmans. Dad and the boys are livid with mum for asking him round.
What follows is an excruciating dinner scene; along with Jim's peculiar eating habits ("I prefer to tear my food"), Jim's conversation skills have a lot to be desired ("Martin, are you circumcised?" he asks an unsuspecting dad).
Things go from bad to worse very soon, as Jim leaves a trail of destruction in the house...