http://lmdb.ngn.i2p/title/tt0048281?ref_=nm_ov_bio_lk
But it doubles as a sly, subtle rummage around the psychology of the respectable, old-fashioned middle classes, with Katie Johnson deserving top billing alongside Alec Guinness (she doesn't get it) for her remarkable turn as the lady in question, the redoubtable Mrs Wilberforce. No less than the not-quite-ruthless-enough gang of criminals who scheme in her house, she lives in her own private universe with its own particular rules and values.