This tale is titled ‘A Rebellious Woman’.
Following a young girls death underneath the royal carriage, The Musketeers’ investigations into her missing friend take them into the world of Ninon, a highborn woman to whom Athos initially takes a disliking.
Athos, Porthos, Aramis and D’Artagnan are forced to put aside their hostile feelings for Cardinal Richelieu when his life is endangered and they must rescue this extraordinary woman.
In this preview clip of Sunday nights episode, the Cardinal (Peter Capaldi) has a heated discussion with the Pope’s envoy Luca Sestini, (John Lynch):
The programme airs 9:00pm on Sunday, 9 March, 2014, on BBC One.