Plot summary
With the Vikings still recovering, Ragnar orders another attack. Led by Rollo, Lagertha, and Kalf, they manage to pass the bridge, but they are once again pushed back. Siegfried is captured and executed on Gisla's insistence. Although the Franks have managed to defend the city, a plague has spread in Paris and citizens are dying. Count Odo begs the Emperor to come to terms with their enemy. Ragnar's wounds won't heal, leaving him weak. Trying to restore his leadership, he secretly meets the Franks; although offered gold and silver, Ragnar doesn't accept.
Knowing his end is drawing near, he asks to be baptized and to be buried inside the city. Meanwhile, Aslaug rules in Kattegat and deals with the Christian missionary Ansgar. Ansgar tries to carry a hot piece of metal to prove the might of the Christian god. When he fails, Aslaug has him killed. In England, King Ecbert and Judith start up an affair.
Credits
Adapted from Wikipedia contributors, Vikings season 3. HTML formatting and reference markers removed.