Who Killed the Cat? is a 1966 British crime film directed by Montgomery Tully and starring Mary Merrall, Ellen Pollock and Amy Dalby.] The screenplay was by Maurice J. Wilson and Tully, based on the 1956 play Tabitha by Arnold Ridley and Mary Cathcart Borer.
Plot
Three elderly spinsters become amateur detectives when someone poisons their beloved cat. The three determine the cat was poisoned by their mean landlady and they decide to take revenge. They plan to murder the landlady, but fate takes a hand in matters.
Source: Wikipedia
