When Aethelred died, his sons were too young to become King and instead, the throne passed to their uncle Alfred.
Aethelhelm, the richest man in Wessex, was introduced in season three of The Last Kingdom when his daughter Aelflaed married Edward.
In the new series of The Last Kingdom, Lord Aethelhelm is a new enemy of Uhtred of Bebbanburg.
Their rivalry comes as a shock as they technically should be allies as they are both loyal to Edward.
However, Aethelehelm wants to see his own grandchildren on the throne of Wessex, not Edward’s.
Fan’s will have to finish the entire new series of The Last Kingdom to find out what happens to Aethelhelm.
The Last Kingdom is streaming on Netflix now