YMMV / Midsomer Murders S 12 E 2

• Complete Monster: Patricia Blackshaw seeks to increase the value of her collection of paintings by the famed artist Hogson. After being outbid on a Hogson painting, Patricia tracks down the seller, an old woman in her 80s, and hideously tortures her by burning her on a stove before murdering her after prolonged torture. Tracking down a man involved in a forgery ring, Patricia ties him up and spends a long while working on him with a knife to get information, before dispatching him as well. Finally slashing the throat of an art dealer, Patricia confesses her intention was to make sure her own collection was worth more by eliminating forgeries, and showcases a penchant for Cold-Blooded Torture that surpasses nearly all other killers.