| cast |
| Series Regulars | |||
| Cynthia Nixon | Cynthia Nixon as Petranilla | Miranda Richardson | Miranda Richardson as Mother Cecilia |
| Tom Cullen | Tom Cullen as Wulfric | Sarah Gadon | Sarah Gadon as Philippa |
| Rupert Evans | Rupert Evans as Godwyn | Peter Firth | Peter Firth as Earl Roland |
| Oliver Jackson-Cohen | Oliver Jackson-Cohen as Ralph | Nora von Waldstätten | Nora von Waldstätten as Gwenda |
| Indira Varma | Indira Varma as Mattie Wise | Ian Pirie | Ian Pirie as Elfric |
| David Bradley | David Bradley as Brother Joseph | Charlotte Riley | Charlotte Riley as Caris |
| Carlo Rota | Carlo Rota as Edmund | Ben Chaplin | Ben Chaplin as Sir Thomas Langley |
| Aure Atika | Aure Atika as Queen Isabella | Tom Weston-Jones | Tom Weston-Jones as Merthin |
| Fernanda Dorogi | Fernanda Dorogi as Silvia | Oliver Maltman | Oliver Maltman as Bishop Richard |
| David Oakes | David Oakes as Bishop Henri | Blake Ritson | Blake Ritson as Edward III |
| Megan Follows | Megan Follows as Maud | Tatiana Maslany | Tatiana Maslany as Sister Meir |