The season focuses on King Bjorn's reign over Kattegat, Ivar's adventures in Rus' and Wessex, and Ubbe's expeditions to Iceland and North America (Greenland and Mi'kma'ki/Canada).

Norwegian actor and YouTuber Per Fredrik Åsly (better known as PelleK) appears in "All the Prisoners", "The Key" and "Resurrection" as an envoy from Ubbe's trade expedition.

Polish singer Anna Maria Jopek appears in "Death and the Serpent", performing the song "Lagertha's Lament" alongside musician Maciej Rychly.

Morgan O'Sullivan, Sheila Hockin, Sherry Marsh, Alan Gasmer, James Flynn, John Weber, and Michael Hirst are credited as executive producers.

"[7] In September 2017, it was announced that Russian actor Danila Kozlovsky would join the cast for the sixth season as Oleg of Novgorod, the 10th century Varangian ruler of the Kyivan Rus.

[11] The Skaldic version of "Snake Pit Poetry", an original song by Einar Selvik which was first included in "All His Angels", is featured in "The Best Laid Plans".

Music by Danish folk project Danheim is also featured in this season's soundtrack in the episodes "Resurrection", "The Best Laid Plans", "The Signal" and "The Raft of Medusa".

[16][17] Most notably, in the series Christianity is introduced in Kievan Rus too early, as are Mongol clothing and armor and hot air balloons.