http://www.filimadami.com/keywords/11/seri-katil/
http://en.wikipedia.org/wiki/Category:Serial_killer_films
http://en.wikipedia.org/wiki/Hitman
http://www.ranker.com/crowdranked-list/the-best-assassin-movies?var=2&utm_expid=16418821-2.PAaBT_MORcmI67lBYq2pgw.1