Season 3 (2005)

A series of bombs rocks Fremont, California, targeting, among others, the chief and the ex-chief of police.

Police scramble to find the owner of a private school who vanished from his driveway.

The trail left by a killer leads North Yorkshire police and forensic scientists halfway around the world.

The murder of a gay couple in rural California has police stymied – who would want to hurt the well-like pair? As investigators and forensic scientists dig deeper, they suspect the killings are linked to a series of arsons that have destroyed several synagogues and an abortion clinic. The trail leads them to the sinister world of hate crimes – and a chilling plan that must be stopped.

An investigation into the murder of a Russian prostitute in Los Angeles.

Police investigate four murders committed in one weekend in Barrie, Ont.