Betsy Jones-Moreland

Ev; her husband, Harold; and their lawyer friend, Martin, are skindiving while on vacation in Puerto Rico. When they resurface, they gradually conclude that an unexplained, temporary interruption of oxygen has killed everyone on the island - maybe in the world! (imdb)

American crook Sparks Moran sees a chance to make a bundle when a Caribbean island has a revolution. He plans to help loyalists (and the national treasury) escape on his boat, then kill the men and blame their deaths on a mythical sea monster. Trouble ensues when the _real_ monster shows up! (imdb)

In the Viking era, somewhere in the North Atlantic area, the Viking Women are awaiting the return of their Viking Men from a hunting expedition and, growing tired of the long wait, the Viking women, led by Desir, (and, possibly desire as Viking Nights are long and cold), set sail in search of their Viking Men. In the course of the journey, their ship is destroyed and a handful (of the best-looking ones) are washed upon an island. (imdb)