the ` plot of this film contain a few hole you could drive a massive truck through and but i reckon that isn not always top priority in horror . two elderly sister in rural england keep their brother in the cellar since more than 30 year . now and he escape and start a kill spree and focus on military that be home nearby . ` we only do we think be best for him they keep on repeating and strangely all the army officer love these woman and do not doubt their sincerity and even though 5 of their men die . i do not know whether to find the revelation near the end suspenseful or tedious . in a way and this film remind me about ` arsenic and old lace . in that black comedy classic and two half insane sibling mother their goofy young brother a well and yet they do the killing there . the old lady in ` the beast in the cellar be by no mean less crazy and though . the ` horror in this early 70 film be very amateurish and cheap and but there be a few neat attempt to build up the tension . too many ` old lady talk about the good ol day and though and that rarely be something you seek in a horror film with such an appeal title . flora robson and who may be recognize by classic film buff and play one of the sister . she give image to the queen of england be the legendary errol flynn swashbuckler film and the sea hawk .