A thriller is a film which uses suspense to create a thrill for the audience.
A sub-genre is a film that falls under the main genre category that has recognisable features that allow it to be classes as a sub-genre.
This sub-genre plays with your mind and is almost like a puzzle which you have to work out.
Usually include love triangles, affairs and murderous passions.
Include Government corruption, cooperate corruption and espionage
Story line is Good vs. Evil