: S5E4 is titled " Architecture " and explores the "plan" and design behind buildings, from ancient pagodas to geodesic domes.
Originally aired on December 13, 2017, this episode focuses on the escalating conflict between the sons of Ragnar Lothbrok and the Saxon forces. [S5E4] The Plan
: Titled " Pandora’s Box ," this episode features the plan to finally open the bunker after six years, testing the loyalty of the grounders and Sky People. : S5E4 is titled " Architecture " and