Guest Stars Emma Fielding as Nicolette Natalie Simpson as Sister Simplice Erin Doherty as Fabienne Lorcan Cranitch as Chief Inspector / Prefect of Police Mailow Defoy as Little Cosette Lily Newmark as Sophie Sean Cernow as Phillipe Patricia Allison as Marguerite Woody Norman as Young Marius Ben Fox as Montreuil Official James Garnon as Bamatabois Sienna Barnes as Little Éponine Emmanuel Goffin as Little Gavroche Bert Steketee as Fauchelevent Meabh Maguire as Sceptical Woman Amani Johnson as Little Azelma