The alien robot GRURK has been waylaid by bunting, but its inexorable march towards London cannot be stopped! At Trumpington Abbey, space scientist Dr. Boy Brett and his assistant Doris Night (a lady) welcome reinforcements from the British Army but do the soldiers herald a heightened level of competence… or a right royal Carry On? And what does a field-full of mouldy turnips have to play in the enfolding cosmic drama?!