In the wake of “Death On The Nile,” we peer through our spyglass at that classic sub-sub-genre Nautical Murder Mysteries. Along for the pleasure cruise is Mashable illustrator Bob Al-Greene, who’s currently working on the first-ever graphic novelization of an Agatha Christie mystery. We talk Poirot, Branagh, and distracting CGI before diving into our other nautical murder mysteries: “Dead Calm” (1989) and “Murder Mystery” (2019). Did the skipper do it? Listen in.