Before the epic Battle of Hastings, two other invasions in 1066 rock England. The attacks force its new king, Harold Godwinson, to risk his life defending his crown against Viking king Harald Hardrada of Norway and Duke William of Normandy. Join host Dan Snow as he travels Europe to explore medieval battle sites, comb through extraordinary manuscripts, and meet with historians to uncover new insights into this enigmatic period in our history. Air Date: Apr 23, 2018