A British sleuth (Harry H. Corbett) and his sidekick find monsters at the mansion of a mad doctor (Kenneth Williams) and his sister (Fenella Fielding).
ghoul, monster, madman, vampire, detective, shocking, thrilling, airy, amusing, hilarious, castle, forest, parody, horror, monsters, kidnapping, investigation, mystery, adventure, escape, rescue, pursuit, 1960s
This 12th of the franchise shows that the series could also tackle satire, as well as the tits and bum humour.
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