Young swordsman d'Artagnan arrives in Paris seeking the man responsible for killing his father – a quest that brings him into conflict with one of the king's guards. But as he quickly discovers, when you take on one Musketeer, you take on them all. It's soon back to business when the swashbuckling heroes are ordered to find a missing soldier who was carrying important letters on behalf of King Louis, while the dastardly Cardinal Richelieu plots to increase his political power.

The episode was rated 7.81 from 846 votes.

D'Artagnan must protect King Louis when a notorious criminal kidnaps them both.

The episode was rated 7.82 from 317 votes.

An astronomer gathers the royal party to see an eclipse, but events take a dramatic turn.

The episode was rated 7.88 from 328 votes.

When Aramis's old friend and former musketeer, Marsac, unexpectedly returns to Paris, the musketeers are thrown into turmoil, fully aware that they should report him for desertion. His appearance coincides with the royal visit of the King's beloved sister and her husband, the Duke of Savoy, whom the musketeers must protect. Marsac believes he finally knows the truth behind the infamous massacre which killed his troop, and wants Aramis's help to prove it.

The episode was rated 7.88 from 499 votes.

Aramis and D’Artagnan have troubles transporting a young woman and her baby from a village outside Paris. The King’s royal hunting party is disrupted by the appearance of Louis’ banished mother seeking royal protection from an unknown assassin.

The episode was rated 7.90 from 443 votes.

Following the tragic death of a young girl underneath the royal carriage, The Musketeers’ investigations into her missing friend lead them into the world of a high-born and enlightened woman. The Musketeers are forced to put aside their animosity towards the Cardinal when his life is placed in danger and they must rescue this extraordinary woman.

The episode was rated 7.94 from 426 votes.

The Musketeers are tasked with bringing the fearsome Labarge, a regional intendant under arrest for the murder of two Musketeers, to Paris. The Red Guards, resentful of the Musketeers' handling of him, initiate a vicious fight between the two regiments. Fed up with the disruptive rivalry between the Musketeers and the Red Guards, the King calls a contest to prove which group is the stronger. D'Artagnan is determined to be chosen to fight so that he can prove himself worthy to be a Musketeer.

The episode was rated 7.96 from 423 votes.

Porthos uncovers the truth about his parentage and demands answers from his new found father. As he learns more about his past, Porthos questions his place in the Musketeers regiment. However the Musketeers have suspicions about Porthos’ new family, wondering whether he should trust them. Can they save Porthos from the dangers that lie ahead and where do his true loyalties lie?

The episode was rated 7.97 from 349 votes.

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. 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.

The episode was rated 7.99 from 397 votes.

When death strikes the Louvre, Treville takes controversial steps to protect the Dauphin from the unholy alliance of Grimaud, Gaston and the Duke of Lorraine. His secretive tactics isolate the Queen and threaten to drive even his loyal Musketeers apart.

The episode was rated 8.07 from 390 votes.

The Musketeers must put their lives on the line when the Queen is accused of treason. They have no choice but to steal her away from the Palace to safety, while they search for evidence to prove that Rochefort is a Spanish spy. However it soon transpires that nobody is safe from Rochefort’s grasp, not even the King, with devastating consequences.

The episode was rated 8.08 from 380 votes.

Queen Anne’s taking of the waters is cut short when her life is put in mortal danger. King Louis dines with wealthy German banker Count Mellendorf, who is looking for a French match for his beautiful daughter. As the Musketeers try to spirit Anne back to Paris, they’re forced to seek refuge in a fortified convent, where Aramis comes face to face with his past.

The episode was rated 8.10 from 420 votes.

Athos takes a woman hostage in the square and the Musketeers are amazed to discover he is threatening none other than Milady. Athos is furious when he finds out that D’Artagnan knows her, testing their friendship to its limits. The Cardinal, fearful the Musketeers will prove he masterminded the attempt on the Queen’s life, compels Milady to kill them by any means. Milady has no choice but to revisit her dark past and in doing so puts Constance into danger. The Musketeers must use all their wits and courage to outsmart her and save Constance.

The episode was rated 8.12 from 413 votes.

Following Treville's funeral the musketeers survive an attempt by Grimaud to kill them when their garrison is torched, leaving many casualties, and gunpowder and weapons stolen. To lure the musketeers into a trap Grimaud takes hostages including Sylvie but the four comrades stage a rescue, and the queen and Dauphin are restored to the palace with Milady as the royal spy master, her first task being to take care of Gaston. However the mortally wounded Grimaud escapes and the musketeers must stop him from blowing up the city with the stolen gunpowder.

The episode was rated 8.21 from 400 votes.

The Musketeers must risk everything to save France from Rochefort’s treacherous plan. While Porthos seeks to lure the Spanish spy-master to Paris to prove Rochefort’s betrayal to the King, Athos and d’Artagnan must save Constance from certain death. But will they be able to protect Aramis and the Queen before Rochefort gets to them? The fate of France and their closest comrades lies in the Musketeers’ hands.

The episode was rated 8.26 from 400 votes.