The oft-mentioned (at least in this episode) Lydia Hawksworth eventually makes an appearance in the final moments, played by an uncredited actress. Ironically, series regular Emmett Hawksworth (apparently no relation) does not appear at all, although David Griffin is still listed in the end credits as playing him.
This episode is variously known as "The Rolls-Royce" or "A Craftswoman Scorned".
This episode was originally broadcast on the 5 year anniversary of the debut of the very first episode back in 1990.