Enchanted
French noble children are disappearing from thier homes in the middle of the night without signs of a sturggle, and the Musketeers are called in to unravel this mystery. All the while, Ramon, falls under the spell of the beautiful poet and enchantress, who with the Cardinal and the Secret Order, plan to brain wash the children and then implant them back into society (think 'Manchurian Canidate' like).
Other episodes for this season