Britannia Guest cast, played by Caolan Byrne Episode 2x01: Episode 1 (Nov 7, 2019) Episode 2x02: Episode 2 (Nov 7, 2019) Episode 2x03: Episode 3 (Nov 7, 2019) Episode 2x05: Episode 5 (Nov 7, 2019) Episode 2x08: Episode 8 (Nov 7, 2019)