The Siege

S2, E21: As troops are about to descend on the castle, Mary and Francis must put aside their differences to determine the extent of Conde's betrayal. Mary also learns of a bittersweet revelation that tears her apart and makes her question everything. Meanwhile, Catherine decides to teach Narcisse a lesson to prove he can never cross her again and Bash decides to bring Delphine (guest star Alexandra Ordolis) to the castle. Caitlin Stasey, Anna Popplewell, Celina Sinden, Jonathan Keltz and Rose Williams also star.