Season 4 Edit
After Aslaug's death, Ubbe attempts to kill Lagertha, to avenge her, but is stopped by her guards and fails. He swears to kill Lagertha to avenge his mother, despite Astrid's warnings to kill them, him and Sigurd, if they touch Lagertha.
As a son of Ragnar he has grown up on the tales of his fathers bravery and glory. Despite his youth he is sharp and assertive, able to track Floki through the wilderness and cunning enough to spot him in the water. His loyalty to his father is unquestionable along with his loyalty to his brothers especially his older half-brother Bjorn, much to his mother's displeasure.
- As of the Season 2 finale, Ubbe and his brothers would be known by the Old Norse title Budlungr or 'prince'.
- Ubbe is best remembered as one of the principle leaders, along with his brothers, Ivar the Boneless and Halfdan (Hvitserk), of the unified Danish Viking army which the Anglo-Saxon Chronicles refers to as the Mycel Heathen Here (the Great Heathen Army). Ubbe reportedly assisted with the Danish conquests of the kingdoms of Northumbria, East Anglia and the northern half of Mercia. Ubbe also led raiding expeditions against the Welsh kingdoms, notably Dyfed whenever he wasn't in England.
- Ubbe's base of power may have been on the island of Walcheren in the mouth of the River Scheldt in Frisia (modern Netherlands), as the Danish Vikings had been operating within the country during the two decades leading up to the Danish conquests in England from 865 CE onward. From there, a number of Frisians, a coastal plains-dwelling people who were known themselves for their piratical activities, may have been recruited into the Mycel Heathen Here.
- Ubbe and his brother Ivar are said to have killed the English King Edmund of East Anglia. Ubbe was killed in the Battle of Cynwit in Devonshire, England in 878. He was 53 years old.
|Season two appearances|
|Brother's War||Invasion||Treachery||Eye For an Eye||Answers in Blood|
|Unforgiven||Blood Eagle||Boneless||The Choice||The Lord's Prayer|
|Season three appearances|
|Mercenary||The Wanderer||Warrior's Fate||Scarred||The Usurper|
|Born Again||Paris||To the Gates!||Breaking Point||The Dead|