Previously unavailable story featuring the 8th Doctor, Grae and Tamara.

A woman, a man, a stone and a problem.  The Doctor comes to the aid of an old friend, an archeologist who's found something improbable in a muddy field.   The local pagan community might be the only people who can shed light on the discovery, but their facing problems of their own as newer, more radical elements rise through the ranks.  But a side-trip back in time to the source of the problem brings more questions than answers, as the Doctor uncovers... a woman, a man, a stone and a problem.