Ragnar "Lothbrok" Sigurdsson is a main character in the historical drama series Vikings, created by Canadian network History.

He is portrayed by Travis Fimmel and is based on Ragnar Lodbrok, a 9th-century Viking farmer and warrior who raided Anglo-Saxon villages in England.

Fimmel initially felt uneasy about it, but he was convinced of its importance and impact on Ragnar's sons, saying: "me and Michael spoke about how the kids will find out what he said.

Ragnar's warband returns in triumph to Kattegat, where the Earl immediately confiscates the plundered riches except for one piece per man.

Now accompanied by Lagertha and the Earl's brother, Knut, Ragnar re-embarks post-haste, leaving Athelstan to mind the farm and the children.

As the Vikings set foot on English soil, they are met by the local sheriff and a handful of armsmen, who invite the newly landed "traders" to meet King Aelle.

Back on the beach, the raiders defeat a superior Northumbrian force under Lord Wigea, sent by King Aelle, and return to Kattegat.

The family hides in Floki's house, where the shipwright and his lover Helga slowly nurse Ragnar back to health.

Instead of paying the ransom, Aelle has his men attack Ragnar's camp, but they are bloodily repelled, ending with Rollo finishing off several Saxons single-handedly, in an attempt to prove he's still faithful to his gods.

Meanwhile, back in Scandinavia, Lagertha rules in Ragnar's stead, accepts Siggy's offer of service, and suffers a miscarriage.

As Lagertha is unable to conceive another son, Ragnar takes his family and followers to the temple at Uppsala to attend a great rite to the Æsir and Vanir.

Ragnar's embassy to Jarl Borg in Götaland fails, as King Horik rejects a compromise settlement about the contested land.

With all the able warriors gone, Rollo rallies the village's women, children and elderly, but Borg massacres them and seizes control of Kattegat.

Ragnar and Bjorn sneak into the town at night and set fire to the winter food stores, forcing Borg to give chase.

Jarl Borg returns to Kattegat to join forces with Ragnar, but during the night his men are burned alive and he is taken captive.

Horik persuades Ragnar to delay killing Jarl Borg, in case his execution scares off potential allies.

Aslaug's prophecy comes to pass when she gives birth to a son with malformed legs following a difficult labour that almost kills both mother and child.

After landing in Wessex, Ragnar decides on his own to send Torstein to inform Ecbert of their arrival, annoying Horik and Lagertha.

Ælla wants to destroy the remaining Vikings but instead Ecbert decides to offer them land and to employ them as mercenaries to fight against Mercia.

When Lagertha announces she intends to raid with Ragnar, Kalf, her right-hand man, offers to remain and take care of Hedeby.

While Ragnar and his men fight their way up the hill, Aethelwulf's archers surround Kwenthrith's brother, killing many and forcing him to surrender.

He takes Princess Gisla as a hostage and forces the guards to open the gates, allowing the Vikings to enter the city.

Most of the Vikings then set sail for home, but a small party, led by Rollo, remain camped outside the city to maintain a presence for next year's raid.

Emperor Charles is determined to gain his favour, offering Rollo land and titles, and his daughter in marriage in exchange for his pledge to defend Paris against future Viking attacks.

King Harald's brother Halfdan arrives in Kattegat and lets Ragnar know he is eager to kill Christians.

Ragnar tells Bjorn to land near a cliff, and reveals a new plan: they will take the ships overland, behind the Frankish forts.

Thorhall delivers the news to Aslaug and Bjorn that the Norse settlement in England had been slaughtered, and also that Ragnar has a son named Magnus in Wessex.

Ragnar asks his sons to come with him to England, but Bjorn refuses, as he plans to raid the Mediterranean with Floki, Harald, and Hvitserk.

Ecbert admits to ordering Aethelwulf to kill the Norse settlers, expresses regret, and frees Ragnar from his cage.

Ragnar's development throughout the series has received very positive reviews and is seen as the role that launched Travis Fimmel into international recognition.