When Darnley gets a surprise visitor, his marriage to Mary hangs in the balance. Elizabeth learns her attempt to stop Mary backfired. Meanwhile, Catherine and Narcisse find King Charles and must convince him to return to the castle.

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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