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Queen Anne’s taking of the waters is cut short when her life is put in mortal danger. Meanwhile, Louis (Ryan Gage) dines with wealthy German banker Count Mellendorf, who is looking for a French match for his beautiful daughter.

As the Musketeers try to spirit Anne back to Paris, they’re forced to seek refuge in a fortified convent, where Aramis comes face to face with his past. Under siege and fearful for their lives, the Mother Superior and nuns help the Musketeers to defend the convent, but what will they do once they run out of ammunition?

Charlotte Hope guest stars as Charlotte Mellendorf and Alice Patten is Sister Helene.

The Musketeers episode 9 airs on Sunday, 23 March at 9pm on BBC One.

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(C) BBC/Dusan Martincek

Watch a clip below…