The central characters outside the conglomerate circle of villainy, however, are Michael Hordern’s Melius, the Jewish alchemist, and his surrogate son Gavin, played by Jack Wild. Wild brings some of the urchinry he put to good use as the Artful Dodger in Oliver to the character. But here he has a settled home and a scholarly Jewish guardian with his best interests at heart. Melius’ laboratory cum library is a far more welcoming home than the Baron’s forbiddingly dark and labyrinthine castle. It’s filled with light, books, pots and bottles, alembics, bird cages and curios (preserved crocodiles and turtles) which suggest a lively curiosity about the wider world.

Its busy but relaxed atmosphere is in complete contrast with the morbid interiority of the Baron’s gloomy surrounds, or the fussy quarters of the Burgermeister and his wife, where harried servants are constantly having orders shouted at them. Melius and Gavin offer an alternative vision of family life, one which doesn’t involve direct descent, but which does involve a great deal more love.