《不列颠尼亚》由亚马逊网与英国天空电视台合拍，Jez Butterworth、Tom Butterworth和Richard McBrien担任创作人，James Richardson、Pippa Harris、Nicolas Brown和Anne Thomopoulos担任执行制片人，Rick McCallum参与制片。这是亚马逊网第一部「完全在海外拍摄制作的剧集」。Britannia is a drama set in 43AD as the Roman Imperial Army - determined and terrified in equal measure - returns to crush the Celtic heart of Britannia - a mysterious land ruled by warrior women and powerful druids who can channel the powerful forces of the underworld.