Planning: Mystery Thrillers

Mystery: are usually considered a sub-type of crime films or thriller films that focus on the unsolved crime, usually the murder or disappearance of one or more of the characters, or a theft and on the central character - the hard detective hero, as he or she meets various adventures and challenges in the cold and methodical pursuit of the criminal or the solution to the crime. The plot often centres on the deductive ability, prowess, confidence, or diligence of the detective as he or she attempts to unravel the crime or situation by piecing together clues and circumstances, seeking evidence, interrogating witnesses, and tracking down a criminal. The protagonist is the hero.  An example of  this is knock knock.