The second series of this BBC drama comes to an end tonight and sees the Musketeers risking everything to prove Rocheforts treachery. Porthos heads off to to find the Spanish 'M' to whom the evil count is giving all the secrets from the French court. While things aren't looking too good for the Queen and Aramis either. Can the Musketeers save their friends, their country and the royal family from Rochefort's plotting?