Alexandra Ordolis

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.

After Mary (Adelaide Kane) receives an urgent message from her ailing mother (guest star Amy Brenneman) about the dire situation in Scotland, she finds herself looking to Francis (Toby Regbo) for aid. Catherine (Megan Follows) finds herself up against Narcisse (Craig Parker) as she fights to become the regent to Charles (guest star Spencer MacPherson). Meanwhile, Elizabeth (Rachel Skarsten) faces continued pressure to wed. Anna Popplewell, Torrance Coombs, Celina Sinden, Charlie Carrick, Jonathan Keltz and Rose Williams star.

While Francis' life hangs in the balance, Mary becomes the temporary leader of France, which makes her realize she can use her newfound power to save Scotland. Catherine, knowing about Mary's indiscretion with Conde, enlists in Narcisse (Craig Parker) to help beat Mary at her own game. Meanwhile, Bash, having been saved by a Woman in White and determined to send his attempted murderer to death, discovers a familiar face in the village. Rose Williams, Celina Sinden, Jonathan Keltz, Caitlin Stasey and Anna Popplewell also star.

Mary risks everything to take down Conde, even as Francis believes she is turning against France. Catherine makes a bold move and meets with Queen Elizabeth (guest star Rachel Skarsten) in a stunning plot to seek revenge on Mary. Meanwhile, Kenna has a secret that will seal the fate of her relationship with Bash. Celina Sinden, Anna Popplewell, Craig Parker, Jonathan Keltz and Rose Williams also star.

Mary (Adelaide Kane) becomes suspicious of Prince Don Carlos' (guest star Mark Ghanime) true condition and relies on Gideon (Ben Geurens) to help her uncover the truth. Elizabeth (Rachel Skarsten) makes a shocking discovery which could change the course of her reign over England and forces Dudley (Charlie Carrick) to make a tough decision. Meanwhile, Narcisse (Craig Parker) forces Claude (Rose Williams) to marry someone of his choosing, against her wishes. Megan Follows, Anna Popplewell, Torrance Coombs, Celina Sinden and Jonathan Keltz also star.