Stylish chiller thriller with Denzel Washington as homicide detective John Hobbes, who gets the heebie-jeebies at a spate of murders bearing all the trademarks of serial killer Edgar Reese - because Hobbes himself watched Reese put to death in the gas chamber. Forced to confront facts which go against everything the hardened cop knows to be true, Hobbes finds himself on the trail of an unseen entity which can take over anyone it fancies. Darkly X-Files-ish.