BBC One has released the first trailer for the new season of The Musketeers.

The adventure drama returns to BBC One at the end of this month for a final ten episodes as our heroes face their greatest challenge yet.

Season 3 will “shake the Musketeers’ values to the core,” as it “changes their allegiance to the crown, turns their personal lives upside down and compromises their loyalty to those they love, as well as their loyalty to each other.”

Doctor Who star Paul McGann will guest star as “a wealthy nobleman who is engaged to an old friend of Aramis and finds himself in conflict with the Musketeers,” we exclusively revealed last month.

Rupert Everett also joins the cast as this season’s main villain, Philippe Achille.

> Buy the complete Season 1-2 box set on Amazon.

Watch the trailer…

In Season 3’s opening episode, D’Artagnan, Porthos and Athos go into battle with the Spanish, while Aramis battles his conscience at the nearby monastery.

When the evil Lucien Grimaud brings the war to Aramis’ new home, the former friends reunite to foil a stolen arms deal and rescue a group of war orphans. After four years and vowing to never fight again, is Aramis still a Musketeer at heart?

Are you looking forward to Season 3? Let us know below…