The Musketeers - Season 3 - Eps 10: We Are the Garrison
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.
About The Musketeers

Title: The Musketeers
First Air Date: 2014-01-19
Last Air Date: 2016-07-30
Status: Ended
Rating: 6.965/10 (from 184 votes)
Language: EN
Seasons: 3
Total Episodes: 30
Network: BBC America BBC One
Genres: Drama, Action & Adventure
Production Companies: BBC Worldwide, BBC Drama Productions, BBC Worldwide Productions, BBC America
Synopsis
Set in 17th century Paris, musketeers Athos, Porthos, Aramis and D'Artagnan are members of an elite band of soldiers who fight for what is just. They are heroes in the truest and most abiding sense – men that can be trusted and believed in to do the right thing, regardless of personal risk.
Cast

Luke Pasqualino
D'Artagnan

Santiago Cabrera
Aramis

Tom Burke
Athos

Howard Charles
Porthos

Ryan Gage
King Louis

Hugo Speer
Treville

Alexandra Dowling
Queen Anne

Maimie McCoy
Milady de Winter

Tamla Kari
Constance

Rupert Everett
Governor Feron