Sir Percy at one point describes Fumier, who is Chauvelin's man and who spies for him, as a "turd." The word Fumier in French translates as "dung" or "manure."
This episode The Scarlet Pimpernel (1999) was only Jamie Bamber's second screen appearance --- his first being as Midshipman Archie Kennedy in the TV film Horatio Hornblower: The Duel (1998) starring Ioan Gruffudd. About 23 minutes in, Bamber was the man with a slight stutter who interrupts as Lady Blakeney is being grilled by Chauvelin at the dance ball. Later, at the brothel, he is the "virgin" that prostitutes are stripping for a bath.