This is a solid middle-period entry in the long-running German "Krimi" series, based on the ingenious thrillers of Edgar Wallace. In this case, the film-makers were taking the plot seriously and not trying (much) to dazzle the viewer with the nifty cinematic trickery and vivid violence that would become the hallmark of the series. Fortunately, the plot is a strong one, involving the usual murderous infighting over an inheritance, a girls' boarding school, and the wonderfully avenging titular character who breaks necks with the visually impressive snap of his whip. The style fits best into the Eurospy genre of the 60s, which was director Reinl's forte. Besides the monk, there is a weird caretaker who keeps pigeons and who casts creepy facial masks of people at the school, which turn into death masks after the inevitable murder of their models (shades of "I Bury the Living"). A poisoned water pistol serves as one girl's defense from prospective attackers. Karin Dor, the director's statuesque wife, resembles Barbara Steele in the lead role, and series favourite Eddie Arent, normally the effective comic relief, has a quite unexpected role to play here. More effort than usual is spent establishing the Thames-side background, though the German origin is unmistakable. Best of all is the wild lounge score by retro-hip composer Peter Thomas, with chimes and cascading organ swells (à la Vic Mizzy of "Munsters" fame) to highlight the monk's appearances. A lurid-colour sequel, "The Monk With The Whip", is much more campy and flamboyant, in keeping with the later efforts in the series directed by Alfred Vohrer.