First Aired: Jan. 04, 2017 on History Channel
Summary: Bjorn's fleet sails onward and launches a surprise attack; back in Kattegat, Lagertha continues in her quest for power.
- Goof (factual errors): During the actual viking-attack in Algeciras, the mosques where not spared.
- Goof (anachronisms): In the establishing shot of the market of the Spanish town the Vikings attach, they show a basket of cayenne peppers which were not brought to Spain until after Columbus's discoveries.
- SPOILER: First episode without Ragnar
- The man with one eye represents Odin.