The 10 Most Complex Thriller Movies of the 21st Century

"Often the best films are the ones that demand multiple viewings, inspire discussion, and provoke questions, and many of the century's best thrillers are films that are packed with hidden details and meanings. Few things are worse than films that are forgettable and require little thought, and ultimately it's the films that are challenging and thought provoking that rise above the rest.
The 21st Century marked the emergence of some truly amazing auteurs, many of whom made thrillers that were lauded for their creativity and complexity. While what defines complexity is subjective, films that push the boundaries and find their niches can be considered as the most interesting. Here are the ten most complex thrillers of the 21st Century".
Films are in reverse order.