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Season 3 of the historical fantasy series consists of 8 episodes and serves as the final installment of the show. The season originally aired in 2021 and concludes with a major cliffhanger following Sky's decision to cancel the series . Season 3 Overview

: Former enemies Cait and Queen Antedia form an unlikely partnership to survive. Season 3 – Britannia - Rotten Tomatoes

: Cait and her companions search for the Spear of the Silver Dawn to unite the tribes against Rome.

The story continues the Roman conquest of Britain while blending Celtic mythology and hallucinogenic visuals. Key themes this season include:

: Sophie Okonedo joins the cast as Hemple , the cannibalistic wife of Aulus Plautius, who introduces a darker cult into the Roman camp.