Vikings recap: Season 4, Episode 18

Ragnar's plan is realized; the Viking army descends on the coast of Northumbria.

Vikings' Recap: Episode “The Ice Maiden” - So Many Shows!

Vikings Creator Michael Hirst on Season 4 Finale, Jonathan Rhys Meyers' Lusty Debut

Vikings: The Complete Third Season Blu-ray Review

TV Blu-Ray Review: Vikings Season 3 (Canada, 2015) - The AU Review

Vikings recap: Season 4, Episode 18

Vikings' Season 4 Part 2: Episode 18 Recap, “Revenge”

Vikings Season 4 Episode 18 Review & After Show

Vikings recap: Promised

Vikings Season 4 Episode 9 (Death all 'round) recap

Vikings: Valhalla Review: Bloody Nordic Mayhem, Now on Netflix

Vikings Season 4 Episode 18: Revenge Review

Vikings season 6, episode 18 recap - what happened in It's Only Magic?

Vikings (season 4) - Wikipedia