Helen Hayes, Mildred Natwick, Charlie Callas, Jill Clayburgh, Bill Dana, Ed Flanders, Kurt Kasznar, Edward Platt, Kent Smith, Craig Stevens, Fritz Weaver, Lawrence Pressman, Paulette Goddard, Art Carney, Iggie Wolfington
A spinster and her widowed sister, both authors of murder mystery novels, try to track down the killer of a former movie star.