boy (played by the 1960 VILLAGE OF THE DAMNED's Martin Stephens) from under the clutches of his would-be Satanic father and his 'depraved' peers  hence the title which, incidentally, was an underground society that truly existed but, unsurprisingly, this is no historical account. Ironically enough, the flight of the child and his long-suffering (and ill-fated) saintly mother was precipitated by the boy's cousin goading him to witness the debaucheries of their elders being held in the basement! Needless to say, such wickedness is only mildly (in fact, too mildly if you ask me) depicted by the film-makers and these quaint orgies (relagated to the start and end of the film) are more prone to raise a smile than an eyebrow but, even so, there are three instancesof censor-baiting where fetching females (including red-headed Adrienne Corri and Kai Fischer) are shown bare-backed!

The hero had been taken by his loyal guardian (David Lodge) to stay with a travelling circus troupe where he grew up a strong,agile man with a penchant for theatricality, qualities which he will be forced to rely on in his future run-ins with Arne and his men. Swordfights, floggings, prison escapes and impersonations (by Michell of a foppish French ally of Arne's) are the order of the day making for a pacy, full-blooded entertainment punctuated by Clifton Parker's rousing music score (not to mention an amiably goofy cameo from Peter Cushing as Michell's attorney) that, while perhaps falling short of more renowned entries in the genre, is reasonably representative of its British variant