Gideon shows Mary what life could be like if she chose love over country. Catherine fights to cover King Charles' increasingly erratic behavior, while Claude finds an enemy in her sister Leeza.

Adelaide Kane
Mary Stuart

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Megan Follows
Catherine de' Medici

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Celina Sinden
Greer

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Craig Parker
Stéphane Narcisse

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Jonathan Goad
John Knox

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Rachel Skarsten
Elizabeth I of England

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Spencer MacPherson
Charles IX of France

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Ben Geurens
Gideon Blackburn

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Will Kemp
Henry Stuart, Lord Darnley

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Daniel Matmor
Oliver

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Manolo Cardona
Príncipe Thomás de Portugal

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