Plot summary
Horik's wife and children arrive in Kattegat and the village celebrates. To prove to Horik he is trustworthy, Floki poisons Torstein. Horik reveals his plan to kill Ragnar and his entire family. In return for a promise to marry her, Horik orders Siggy to kill Ragnar's children. Þorunn finally gets into a relationship with Bjorn, as a free woman. Athelstan teaches Ragnar the Lord's Prayer. With reinforcements, Horik attacks Kattegat. Arriving in the main hall, he discovers Torstein alive, and sees that Floki and Siggy did not betray Ragnar. Ragnar kills Horik and takes his sword. He spares Erlendur's life, as it was Horik's last wish. Ragnar is now king, sitting atop the iconic cliff Preikestolen.
Credits
Adapted from Wikipedia contributors, Vikings season 2. HTML formatting and reference markers removed.