"Unman, Wittering and Zigo" is a thoroughly peculiar and strangely uncanny gem from the early 70's Brit-movie industry; an era where lots of long-lost forgotten movie classics are still waiting to be re- discovered by cult fanatics. The film lacks explicit bloodshed or exciting actions stunts, but it thrives on ominous atmosphere, a solid and complex screenplay and impeccable acting performances. David Hemmings, perhaps the most shamefully underrated actor/director to come out of Great Britain, stars as a young and still ambitious teacher who enrolls in a strictly catholic male boarding school in the remote British countryside. He takes over class Lower 5-B since their previous teacher died in a most unfortunate accident when he fell off a cliff. When trying to bring some order and discipline amongst the rebellious young men and threatening to give them Saturday afternoon detention, one of his pupils suddenly states: "our previous teacher also wanted to that … and that's why we killed him, Sir". From that moment onwards, the students are provide more and accurate proof that they, in fact, did kill their previous teacher and scare Mr. Ebony into believing that the same might overcome him or his lovely wife Sylvia. Obviously no one believes him – not even his wife – and the pupils continue to push further their blackmail and menacing. "Unman, Wittering and Zigo" (the title refers to the last three names on the alphabetic list that Mr. Ebony runs through to see who's present in class) is a slow-brooding chiller with an immense claustrophobic power. By this I mean that director John MacKenzie manages to make it so obvious that nobody in John Ebony's immediate surrounding even suspects the pupils of anything, whereas he finds himself trapped in a isolated situation of fear from which he cannot escape. To everyone else, the pupils of class Lower 5-B are sophisticated and well-mannered young men and only their teacher knows that they're actually deeply disturbed and nihilistic psychopaths. There are a handful of truly powerful and perturbing sequences, including near the end with John's wife trapped in the school's gym, as well as a terrific use of the contemporary British life-styles and the remote setting. Unfortunately, the film also contains a few defaults, like a largely unsatisfying climax and some dead-end plot lines, but overall I would definitely say this is a gem well worth seeking out and treasuring.