Spencer MacPherson

When King Antoine (guest star Ben Aldridge) unexpectedly returns to Court, Mary (Adelaide Kane) must help Francis (Toby Regbo) hide his weakening condition long enough to secure his family's future. With the Throne in jeopardy and time running out, they must turn to an unlikely ally in need of redemption. Megan Fellows, Anna Popplewell, Craig Parker, Torrance Coombs, Celina Sinden, Jonathan Keltz and Rose Williams 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.

Mary (Adelaide Kane) must find a powerful suitor to align herself with as Charles' (guest star Spencer MacPherson) impending Coronation looms. Lola (Anna Popplewell) stumbles upon the identity of Elizabeth's (Rachel Skarsten) poisoner, while Catherine (Megan Follows) becomes a new kind of victim for the castle's serial killer. Craig Parker, Rose Williams, Celina Sinden, Ben Geurens, Torrance Coombs, Charlie Carrick and Jonathan Keltz also star.

Mary (Adelaide Kane) struggles to resist her feelings for Gideon (Ben Geurens) as she works to align herself politically with potential allies. Elizabeth (Rachel Skarsten) and Greer (Celina Sinden) find themselves in similar heart-wrenching situations with the potential for very different outcomes. Catherine (Megan Follows) and Narcisse (Craig Parker) continue their vicious power struggle over the Regency, while Claude (Rose Williams) finds herself in the fight of her life on her wedding night. Anna Popplewell, Torrance Coombs, Charlie Carrick and Jonathan Keltz also star.

Queen Mary (Adelaide Kane) struggles to hold on to her power in Scotland amidst Queen Elizabeth's (Rachel Skarsten) campaign to sabotage her with the help of a new ally in Queen Catherine (Megan Follows). Meanwhile, with Francis' (Toby Regbo) fate at odds and Elizabeth distracted by temptation in her first love, Robert Dudley (Charlie Carrick), both queens struggle to rule. Torrance Coombs, Celina Sinden, Anna Popplewell, Jonathan Keltz, Craig Parker and Rose Williams star.