In war-torn France, a sinister new battle awaits the Musketeers. The swashbuckling hit series returns for a thrilling third instalment. The royal bodyguards for Louis XIII Athos (Tom Burke, War & Peace), Aramis (Santiago Cabrera, Heroes), Porthos (Howard Charles, Need for Speed) and d Artagnan (Luke Pasqualino, Skins) are back to combat a dangerous new enemy lurking in the shadows of the city. The Musketeers will face their most treacherous test yet. It s a task that will challenge their allegiances to the crown, throw their personal lives into turmoil and compromise their loyalty to those they love and to each other.