The Musketeers must put their lives on the line when the queen is accused of treason.

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.

Milady seeks her revenge against the Musketeers. Will the Musketeers outwit her or will she destroy them by manipulating their weakest link, D'Artagnan?

The Musketeers must risk everything to save France from Rochefort's treacherous plan.

The Musketeers come under siege in a convent whilst protecting the queen's life.

The musketeers help save an enlightened woman who has been accused of witchcraft.

A contest between the Musketeers and Red Guards gives D'Artagnan a chance to prove himself.

Porthos uncovers the truth about his past and questions his allegiance to the Musketeers.

The Musketeers battle to restore order in Paris after Grimaud and Feron stage an ambitious Châtelet breakout, setting free a lunatic with murderous designs on the Louvre.

Aramis and the other Musketeers help a young mother rescue her abducted baby son.

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

The King’s cousin is ambushed while under Musketeer escort as she travels from Mantua to Sweden to make a political marriage that will be advantageous to France.

Chasing Grimaud, the Musketeers make a troubling discovery in a village ruled by women.

Aramis helps an old friend to uncover the truth behind a disastrous mission.

King Louis tasks the Musketeers with bringing his exiled brother, the Duke of Orléans, back to Paris in order to mend bridges. On the way, the Duke is robbed of dangerous letters which could destroy Orléans. The Duke informs the corrupt Governor of this, and the Governor's Red Guard must race the Musketeers in the hunt for the thief.

The Queen's reputation is on the line after Grimaud kidnaps Aramis.

The Musketeers must escort a merchant trader back to Paris and thwart his enemies.

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.

Notorious criminal Vadim seeks to make life unbearable for the authorities that have imprisoned him. When he engineers a full-scale riot, it falls to the Musketeers to protect those whom he seeks to destroy.

Porthos wakes up after his drunken birthday celebrations with a dead body next to him. The Musketeers must prove his innocence as he gets sentenced to death.

Athos, Porthos and D'Artagnan are fighting on the battlefront while Aramis has trouble living in contemplation as a monk. The Musketeers' search for missing gunpowder lead them to follow bandits to Aramis' monastery, where circumstance force them to collaborate to save the monastery's children and brothers. Aramis' finally accepts his true calling as a Musketeer and rejoins his brothers-in-arms in Paris.

The corrupt Governor of Paris conspires with the Duke de Beaufort, primary provider of food for Paris, to stage a robbery of the city's granary and pin it on the refugees, only to later sell the stolen grain back to the King at an inflated price. D'Artagnan is taken captive along with the rioting refugees, and the other Musketeers (along with D'Artagnan's wife Constance, now in charge of the Musketeer garrison) must rescue them from the hands of the Red Guard before they are executed.

Bonnaire is back, and the Musketeers need him to save the future of the English Crown.

The Musketeers must rescue a French general from an impenetrable Spanish prison.

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