<p>Katrina Lyons only visited Cresdon Green for the weekend to see her parents (and incidentally ask if they might lend her the deposit for a flat). Unfortunately this happened to be the weekend when aliens launched an invasion of the village and put a force-field around it. Katrina is trapped in the place where she grew up under the cosh of alien oppression living with her parents.<br /> The invasion led by warlord Uljabaan is a covert pilot scheme for a full invasion of Earth. Katrina determines to stop it and sets up a resistance movement. Disappointingly her sole recruit is sarcastic stoned teenager Lucy Alexander - everyone else is keen not to rock the boat and some think having the world run by alien marauders might actually be an improvement. But Katrina presses on <br /> desperate to save the world and also to get out of here.<br /> This book collects the scripts for the pilot and first series of the BBC Radio sitcom.</p>