Death of a Hero

S3 E6: It's the day of reckoning, as Grimaud vows to kill the Musketeers in a series of savage co-ordinated attacks and puts Feron to the ultimate test in his bid for power. With Athos distracted and Aramis on an unlikely pilgrimage with the King, the Musketeers are divided when they need each other most. The furious battle for survival sparks a series of revelations that threaten to destroy Paris. Before the day is out, a hero falls, there's a traitor on the rise and the Musketeers will be changed forever.