A spinster and her widowed sister, both authors of murder mystery novels, try to track down the killer of a former movie star.
Helen Hayes
as Ernesta Snoop
Mildred Natwick
as Gwendolyn Snoop Nicholson
Charlie Callas
as Charlie
Jill Clayburgh
as Mary Nero
Bill Dana
as Melvin Kaplan
Ed Flanders
as Milo Perkins
Kurt Kasznar
as Alexander Scalamdri
Edward Platt
as Julius Nero
Kent Smith
as Warren Packer
Craig Stevens
as Charles Corman
Fritz Weaver
as Anton de Tourolet
Lawrence Pressman
as Lt. Ostrowski
