Meet Ed. He's the saviour of Earth, but he doesn't know it - yet.

Overlooked for promotion at the Grimloid Protection League (GPL) he was allocated the job of Caretaker to some backwater planet named Earth. Ed suspected that this was due to his rustic accent, which never went down to well with the top brass at the GPL.

The post has always irritated Ed, and as if that wasn't bad enough, Earth is considered far too underdeveloped to contact openly (apart from the occasional slip-up). All landings on Earth and interaction with the dominant race, the Humans, is strictly forbidden by the GPL, with one exception:

Grimloid Protection League Directions for Intergalactic Planetary Caretakers Rule 84a: Third Parties. Intergalactic Planetary Caretakers must take all necessary steps to carefully and subtly readdress violations in intergalactic protocol caused by third parties. Take care to cover your tracks by fabricating stories about corn circles, government cover-ups and conspiracy theories.

Now, if a renegade Grimloid faction, like NEDCO for example, were to invade earth to harvest humans for food, we'd be able to rely on Ed to save us . . .wouldn't we?