This may be my favorite episode of Kolchak – The Night Stalker TV series.  Kolchak ends up on an ocean cruise to do a fluff piece on the singles scene.  It ends up being anything but a pleasure cruise for the intrepid reporter.  A series of brutal attacks on the paying customers ensue and Kolchak theorizes that a werewolf may be responsible.  It turns out one of the guests is harboring a dreadful secret that has a nasty habit of getting completely out of control when the full moon rises.  This is a very suspenseful show full of dark shadows, memorable acting and plenty of spooky scenes.  Eric Braeden (see “Colossus: The Forbin Project”) turns in a powerful performance as the tortured soul who suffers the curse of the werewolf.  Well worth seeking out!