Eight people go to an Austrian castle at the invitation of a mysterious host. They are then informed that each of them is a killer and all will meet their death by the end of the weekend. All start dying one-by-one. Released with a two-minute murder break to allow the audience to guess the
killer. The second of three versions of this Agatha Christie mystery, following 1945's AND THEN THERE WERE NONE, and pre-dating 1975's TEN LITTLE INDIANS. This version, however, is the only one to retain Christie's original ending.