Everyone remembers Mrs Peel. However, let me point readers at Mrs Bradley
https://en.wikipedia.org/wiki/The_Mrs_Bradley_Mysteries
TV series starring Dame Diana as a character created by the also late, great, Gladys Mitchell, one of the major Golden Age mystery writers, ranked with Agatha Christie and Margery Allingham in her day. Mrs Bradley (later Dame Adela) was another elderly, female sleuth, a famous professional psychologist, three times married (the fate of her husbands un-mentioned) on retainer with the Home Office, and as unlike Miss Marple as it is possible to be except in perspicacity and ruthlessness. A number of the books have been reprinted and are well worth reading.
While Diana Rigg did not at all physically resemble the descriptions of Mrs Bradley in the books (commonest epithets: "saurian", "crocodilian", "shrivelled", "terrifying"), she got the personality right, and to my great delight, the literary Mrs Bradley's famous lack of colour, style or fashion sense was translated on TV into a never-ending parade of staggering 1920s suits, frocks, hats, bags and gloves.
https://en.wikipedia.org/wiki/The_Mrs_Bradley_Mysteries
TV series starring Dame Diana as a character created by the also late, great, Gladys Mitchell, one of the major Golden Age mystery writers, ranked with Agatha Christie and Margery Allingham in her day. Mrs Bradley (later Dame Adela) was another elderly, female sleuth, a famous professional psychologist, three times married (the fate of her husbands un-mentioned) on retainer with the Home Office, and as unlike Miss Marple as it is possible to be except in perspicacity and ruthlessness. A number of the books have been reprinted and are well worth reading.
While Diana Rigg did not at all physically resemble the descriptions of Mrs Bradley in the books (commonest epithets: "saurian", "crocodilian", "shrivelled", "terrifying"), she got the personality right, and to my great delight, the literary Mrs Bradley's famous lack of colour, style or fashion sense was translated on TV into a never-ending parade of staggering 1920s suits, frocks, hats, bags and gloves.