Below

Released: 2002
Sci-fi, Horror
Director: David Twohy
Starring: Bruce Greenwood, David Crow
Running Time: 105 minutes
Rated: R

The breakdown:  On a WW II submarine far below the ocean something strange is going on with the crew.

During the second World War, the U.S.S. Tiger Shark is on a normal and routine rescue mission.
Deep below the surface, a few little strange things start to happen.  Someone sees someone that isn't there, people start to hear voices, but is it haunted, or just imagination?

I had literally never heard a peep about this movie and never knew it existed until I found it, quite by accident.  Turned out to be a really good thriller that makes you wonder what's going on until the very end.

I won't say more since the less you the better the movie is.

See it if you get a chance.

3 and 1/2 out of 5 for being a pleasantly scary surprise.