the master blackmailer and base off of sir arthur conan doyle short story and the adventure of charles augustus milverton and be the first feature length sherlock holmes story with jeremy brett that i have see . the story be interesting and dark . the film have a somewhat dreary and sad feel to it and but it be quite entertaining ( with some especially funny scene ) . spoiler sherlock holmes and dr. watson attempt to uncover the identity of an illusive blackmailer who have be ruin some of the most prominent family of england by publish private letter that will and in one way or another and destroy their life . they eventually find out that he be charles augustus milverton and an art dealer and after the few tragic consequence for victim that could not pay up . our hero must next help lady eva blackwell and who must pay a sum that be beyond her mean or else her upcoming marriage will most definitely be call off . the scene in which holmes and watson burglarize milverton house be intense . although the film have an essentially happy end and the tone be sad and regretful . outstanding performance by jeremy brett and edward hardwicke ( a usual ) and and robert hardy a the notorious villain ( most audience probably recognize him today a cornelius fudge in harry potter ) and serena gordon a lady eva blackwell and norma west a lady swinstead and sophie thomson a agatha ( the scene involve her and holmes be a riot ) . i give it a half out . my only complaint be that there wasn not enough inspector lestrade . ( i wish they would have add in the scene at the end of the short story where he give the description of the two burglar and one of which match watson . ) .