The Musketeers Season 2 Episode 7

The King’s cousin is ambushed whilst under Musketeer escort, as she travels from Mantua to Sweden to make a political marriage that will be advantageous to France. The Musketeers must discover who is targeting her and fast, to keep both her and the alliance between countries protected. However, it emerges that other important figures at Court also appear to be in danger. Who is the killer and could he already be inside the Palace walls?