One group of very smart senior sleuths solve some shocking unsolved crimes in Netflix's The Thursday Murder Club. Based on Richard Osman's novels of the same name, the cozy murder mystery follows the residents of Coopers Chase retirement community as they gather weekly to try and solve decades-old cold murder cases with forensic files given to them by their old friend and former police officer, Penny (Susan Kirkby). The club is composed of Elizabeth (Helen Mirren), Ron (Pierce Brosnan), Ibrahim (Ben Kingsley) and new resident Joyce (Celia Imrie).