Guest Stars Rosalie Williams as Mrs. Hudson Colin Jeavons as Inspector Lestrade Sophie Thompson as Agatha Norma West as Lady Diana Swinstead Serena Gordon as Lady Eva Blackwell David Mallinson as Colonel Dorking Robert Hardy as Charles Augustus Milverton Sarah McVicar as The Hon. Charlotte Miles Nickolas Grace as Bertrand Gwen Ffrangcon-Davies as The Dowager
