2/4 As Marcus heads north with Esca, clues appear to the missing Eagle's whereabouts.
BBC Radio 4 Extra
The children of D'Artagnan, Porthos, Aramis and Athos attempt to save the French throne.
3/4 After finding the legion's lost Eagle, Marcus and Esca must risk everything to retake it.
A Chinese imperial guard teams up with a train robber to rescue a kidnapped princess.