Harald Hardrada was king of Norway in the 11th century. He led a Viking invasion of England in 1066. He fought against the Saxons, led by King Harold Godwinson, at Stamford Bridge. The battle ended with victory for the Saxons, but weakened their army. This resulted in the Saxons' later defeat by the Normans during the Battle of Hastings. (TV: The Time Meddler)