Dead Calm

Dead Calm is a movie starring Nicole Kidman, Sam Neill, and Billy Zane. After a tragedy, John Ingram and his wife Rae are spending some time isolated at sea, when they come across a stranger who has abandoned a sinking ship.
An Australian couple take a sailing trip in the Pacific to forget about a terrible accident. While on the open sea, they come across a ship with one survivor who is not at all what he seems.