Lagherta builds defenses to protect Kattegat while Raagnar's sons plot a scheme to kill her. In Wessex, Aethelwulf discusses with his father the consequences of Ragnar's death and releasing Ivar. Meanwhile Bjorn and his fleet reach Spain and together with Rollo, Floki, Harald and Halfdan, they raid a muslin town. Floki is intrigued with a mosque and orders the Vikings to spare the men that are praying inside the temple. They capture the women as slaves and Helga brings a teenager with her. In Kattegat, Ragnar's sons are informed by a creepy cloaked man about the death of their father.
"Crossing" is an episode where Bjorn reaches Spain going further than his father did. The presence of Rollo is surprisingly accepted since the Vikings need him to navigate close to the Frankish coast. Floki's fascination for the mosque is an intriguing moment of the show. My vote is eight.
Title (Brazil): "Crossings"