For decades experts have remained baffled by a jumble of human bones discovered in a unique series of caves on the North York Moors, known as the Windypits. One discovery in particular stands out - a tangle of bones that might belong to a family from two thousand years ago. The trail to uncover answers about what happened to these people leads to a dark world of ritual sacrifice and right back to the limits of British recorded history.

In the sleepy commuter town of Baldock in Hertfordshire the History Cold Case team is called in to investigate the discovery of a skeleton dating from around 100AD, buried in a bizarre position, along with the remains of three babies. Is she Celt or Roman? Is she the earliest recorded mother of triplets in Britain and what can her story reveal about the bizarre attitudes to pregnancy and childbirth during the Roman occupation of Britain?

An apparently African skeleton, unearthed near a medieval English monastery, pushes Professor Sue Black's forensics team to its limits. Bone analysis offers clues about the true origins of the mysterious skeleton and facial reconstruction painstakingly reveals his face, not seen for centuries. The historical trail points to new evidence about British ancestry and the case takes an unexpected twist when they discover the tragic truth about how he died.

In 2008, construction workers just beyond York's city walls uncovered 113 bodies in a mass grave. The History Cold Case team spots an incredibly rare genetic peculiarity in two of the skeletons among the 113 and wonder whether they have stumbled on a pair of brothers, one of whom was severely disabled. The trail to find out who these two men could have been and how they ended up dead in a mass grave outside York opens up a new personalised vantage point on the events surrounding the English Civil War and also gives us a perspective on disability which can perhaps teach us something about so-called modern attitudes today.