Plot: Tony Robinson and science journalist Becky McCall step into the unknown to investigate whether past paranormal events should be taken seriously or dumped into history's litterbin in this new three-part series. From the archaeological secrets of Glastonbury Abbey to the Bath housewives who claimed to be possessed by the spirits of a 13th Century religious sect, Robinson and McCall try to get to the bottom of classic mysteries with the help of historians, scientists and archaeologists