The title says it all.

Image the scene. 2am Wednesday morning the mist is rolling over the fields and the milkman is just starting his early rounds. Then suddenly a bright light appears in the sky and a blast of high pitch engines wakes you up. A little look through the crack in the curtains reveals a small alien landing craft (similar to a star trek runabout) parked in the field opposite.
As you watch a hatch opens and two entities emerge. Each one is about 4ft 6in tall with blue skin large eyes and four arms. They appear to look around the area while talking in strange clicking tones. They see you looking and approach your front door........