Okay, it isn't easy finding enough Miss Marple stories in the Christie canon to create a full-fledged series. But the producers have done a nice job of wedging her into one of Christie's most ingenious tales. Like "The Mirror Crack'd," "The Murder of Roger Ackroyd" and "Murder on the Orient Express," the tale features a wonderfully original plot device -- in this case, a whole new approach to contract killing. Throw in a kind of British take on re-creating the Salem witch trials and you have a mordantly murky and entertaining mystery. Purists may take umbrage at Miss Marple wandering off her own turf to solve a series of seemingly occult murders. But if it's a well-told mystery (as this one is) and doesn't otherwise twist Dame Agatha's story, why not?