'Vikings' Season 3 Spoilers, Plot Recap: Problems Abound in Kattegat as Ragnar Plans to Attack Paris

The most recent episode in "Vikings" aired on History channel on Thursday saw Ragnar (Travis Fimmel) making a deal with Kalf (Ben Robson), finding out that his wife had slept with the Wanderer and sowing the seeds for an attack on Paris.

Episode 5 titled "The Usurper" began with Ragnar and his men returning to Kattegat. He asked Athelstan (George Blagden) for information about Paris and was pleased to hear that it was a great city with huge walls and beautiful women.

When Ragnar and his men arrived, the villagers rushed to the beach to great them. Lagertha (Katheryn Winnick) told both the pregnant wives of Tolstons that he was killed on the battlefield.

Rollo (Clive Standen) searched the beach for Siggy (Jessalyn Gilsig). Aslaug (Alyssa Sutherland) broke the news to him that Siggy drowned and died when she was saving Ragnar's sons from the lake. Rollo freaked out and stormed off. Ragnar demanded to know from Aslaug why Siggy was the one watching their kids and not her. Helga (Maude Hirst) jumped to Aslaug's defense, saying that all three of them were taking turns watching the kids. But Ragnar won't believe her.

A grieving and drunk Rollo then started fighting with the men in the village and even took on Bjorn (Alexander Ludwi).

Lagertha then learned that Kalf has taken over as Earl and asked Ragnar for help. However, Ragnar betrayed Lagertha, telling Kalf that if he help him in his planned attack on Paris he could keep the title.

In Wessex, Judith (Jennie Jacques) revealed to Aethelwulf (Moe Dunford), that she was pregnant and he understandably was furious as they had not slept together since their son was born.

King Ecbert (Linus Roache) asked Aethelwulf to lead the nobles in attacking the Viking settlers. In the ensuing attack, the settlers were massacred. Upon being told of what happened, Ecbert at first pretended to be angry but admitted later that it was his plan all along in his bid to control Mercia.

Back in Kattegat, Ragnar announced his plan to attack Paris and it was met with much enthusiasm by his men. Rollo visited the seer who informed him that the gods had a lot of good in store for him.

Floki (Gustaf Skarsgård) arrived to inform Ragnar that Odin had come to the village as the Wanderer and had slept with Aslaug.