WΔZ (pronounced double-u delta zed), is a 2007 British crime horror thriller film directed by Tom Shankland, written by Clive Bradley, and starring Stellan Skarsgård, Melissa George, Selma Blair and Tom Hardy. The film was released in the United States with the title The KiIIing Gene.


Set against the backdrop of a dark and rain-soaked New York, "WΔZ" follows the investigative efforts of Detective Eddie Argo (portrayed by Stellan Skarsgård) and his newly assigned partner Helen Westcott (played by Melissa George). Together, they embark on a journey to solve a series of gruesome murders that have gripped the city.