On the outside, Jessica Fletcher (Angela Lansbury), a retired Maine schoolteacher turned mystery writer, appears to be quiet and unassuming. But she may actually be one of the best gumshoes ever, as evidenced by her innate ability to ferret out the true criminals in this delightful, long-running television series. Watch how she gets pulled into detective work in picturesque Cabot Cove (where nothing is as it seems) and elsewhere she visits.