The series that takes viewers back in time to investigate some of the most notorious, shocking and surprising murder cases in history returns for an all-new and exclusive third series.

Nicholas Day is on hand to guide viewers into the world of the killer and show how police ingenuity and early forensics brought some of them to justice. In this all-new third series, Nicholas tells stories including that of John George Haigh, the acid bath murderer and the last woman to be hanged in the UK, Ruth Ellis.