Bernice has been invited to appear on a very special live edition of the archaeology series Big Dig: a programme she grew up with as a girl… which now makes her feel very old. Not as old, however, as the mysterious stone robot she unwittingly uncovers during an excavation on the planet Saravas.

With no other trace of civilisation, this could be the only clue to the truth of the planet’s inhabitants. But when Ruth and Jack start acting strangely, Bernice realises there was a reason things were hidden… and secrets aren’t the only things to be buried.

Welcome to the biggest Big Dig ever!