Season 2 Edit
Ubbe was born in the four year gap between Season 2 Episode 1 and 2. A young Ubbe is mostly seen with his mother Aslaug and his younger brother Hvitserk. Ubbe flees with Aslaug, Hvitserk, Rollo, Siggy and Helga after Jarl Borg invades Kattegatte. Ragnar eventually returns from England where he is reunited with his family and with the assistance of Lagetha and Bjorn, he takes back Kattegatte from Jarl Borg.
Season 3 Edit
An older Ubbe is still seen playing with his brother Hvitserk and Siguard. One day while Aslug is away and Siggy is watching them Ubbe and Hvitserk wander off onto a frozen lake but Siggy pursues them. She calls out to them despite them knowing she is there Ubbe and Hvitserk ignore her. The ice breaks and Ubbe and Hvitserk fall in. They bothe nearly drown but Siggy dives in and saves them with the help of Harbard but at the cost of Siggy's life and she drowns.
Season 4 Edit
At he start of season 4 Ubbe and a hunting party are searching for Floki after he escaped his chains after being arrested for killing Athelstan by Bjorn. Ubbe then spots Floki hiding underwater and they recapture him. Ubbe and Hvitserk receive their arm rings from their father so that they can come to Paris with him but not to fight. The Franks then attack the viking camp but Ubbe and the others manage to escape but Helga is previously wounded. After the Vikings defeat at the hands of Rollo and the Franks Ubbe returns to Kattegatte with the broken and defeated Viking army.
Ten years later after Ragnar disappeared Ubbe has grown up into a strong and skilled warrior as have all of Ragnar's sons. Ubbe has come to resemble Ragnar as a young man. Bjorn brings the news that the vikings settlement in Wessex was destroyed to his brothers. Ubbe and his brother discuss why Ragnar didn't tell anyone. Ubbe then says that if it is true that Ragnar didn't tell anyone then he hopes his father never comes back. Ivar gets angry at Ubbe for insulting his father and refers them as "christians" calling them soft, Ubbe angrily tells Ivar that he isn't soft, none of Ragnar's sons are soft, as his son Ubbe didn't care about his father's fame but what he used his power for that would interest him. Ragnar then returns to Kattegatte after a long absence, a broken man. He then reunites with his sons after ten long years and challenges his sons to kill him (especially Ubbe) so that they can become king.
None of Ragnar's sons step forward to challenge their father except for Ubbe but instead they just embrace. Ragnar and his sons discuss the lost Wessex settlement and why he came back. Ragnar asks his sons to come to England with him but Ubbe (along with Siguard) say they are staying in Kattegatte to protect their mother. After being invited to Hereby by Lagetha while so usurps the throne from Aslaug and becomes queen of Kategatte and killing Aslaug as revenge for taking Ragnar and her life away from her. finding out about his mother'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. Ubbe and his brothers are watched closely by Lagatha's warriors. Ivar returns from England safe and informs his brothers that their father has been handed over to King Alle and is likely dead and they have to avenge him. Ubbe then informs Ivar that their mother is dead to Ivar's fury. Odin himself then approachs Ubbe and his brother and tells them their father is dead. Ubbe and Ivar try to kill Lagatha again but are stopped by Bjorn, who says they will have to kill as well as Lagatha, Ivar suggests that maybe they should, Ubbe tells him angrily to shut up. Ubbe frees and marries a slave girl named Magathe. Ubbe and his brother summon and form the Great Heathen Army to avenge their father. They easily defeat the forces of Northumbria and killing King Alle with a blood eagle ceremony. The Great Heathen Army then faces the force of Wessex, confusing and outmenuvering the forces and causing them to retreat. They capture King Ecbert and High Pope. Ivar demands a blood eagle for King Ecbert but Ubbe and his brother convince Ivar otherwise. Later Ubbe watches in horror as Ivar kills Siguard by trowing an axe into his stomach. Ubbe shots "No!!!!!" and cradles his brother's body and Ubbe and Hvitserk glare at Ivar in anger, who shows no remorse for killing Siguard.
Season 5 Edit
Ubbe will appear in this season fighting with Lagertha against Ivar and Harald.
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|
|Season five appearances|