简介：Ragnar and Lagertha's fleets depart Kattegat once more for Wessex but this time they bring settlers. King Ecbert hosts the Vikings and proposes a deal. Despite the misgivings of some of the other leaders, Ragnar leads his forces into battle once more, but this time as allies of Wessex.
4.0 元素大都會：製作特輯(港)/元素方城市：幕後特輯(台)/A/Química/da/Pixar/Tudo/Sobre/Elementos(巴西)/Bonne/alchimie//L'histoire/d'élémentaire(法)/Die/Chemie/stimmt/Die/Geschichte/hinter/Elemental(德)/Quando c'è chimica - La storia dietro Elemental/