Oliver Cromwell is the great bogeyman of Irish history. His name appears everywhere in the collective psyche of the island. He is a towering figure, a dark silhouette against the bloodstained backdrop of history. But why did he come to Ireland, and does he deserve this black reputation? For the first time in this major television series we get a serious insight into Cromwell the man Cromwell -God's Executioner, is an epic but very real, gritty and bloody portrait of warfare in the 17th century.