- HD 1080
- Runtime: 104m.
- Status: Released
- 1
- Languages: en
- Country: United Kingdom
- Director: Tom Shankland
- Stars: Selma Blair, Melissa George, Stellan Skarsgård, Sally Hawkins, John Sharian
- keywords: police, chase, psychopath, detective, investigation, revenge, slasher, torture, drugs, death, evil, neo-noir
- Production_studio: Vertigo Films, UK Film Council, Northern Ireland Screen, Ingenious Media
- Slogan: Would you kill the one you love to save yourself from death?
- providers: Starz Apple TV Channel, Starz Roku Premium Channel, Starz, Starz Amazon Channel
- The WΔZ is featured in the top rankings of 2007
- #92 in Top Crime Movies of 2007
- #74 in Top Horror Movies of 2007
There is something horribly wrong with the bodies found in the dark city streets. Some are mutilated while others have the Price equation (wΔz = Cov (w,z) = βwzVz) carved into their flesh. Detective Eddie Argo and his new partner Helen Westcott unearth the meaning of the odd equation and realise each victim is being offered a gruesome choice: kill your loved ones, or be killed. Before long it becomes clear that the perpetrator has suffered a similar fate and is now coping by seeking a way to solve this philosophical dilemma.