Season 2

The most violent night in the history of Anchorage, Alaska leaves seven dead - including four teens. And, the small police department is virtually overwhelmed by the string of shootings until clues lead them to the unlikeliest of suspects.

The abduction and murder of an 11-year-old girl in an isolated Alaskan village leaves locals fearing they're being preyed on by an evil outsider until investigators reveal something far more sinister and closer to home.

Baffled by the animal instincts of a cross country killer whose crimes seem to go dormant in winter, authorities ultimately follow his tracks to a den of deceit in the frozen tundra of Alaska.

Colorado police in hot pursuit of a serial killer are horrified when the pre-recorded message of a pager found in the snow near a victim's abandoned vehicle reveals an unthinkable predator: one sworn to protect and serve.

Colorado authorities quickly hone in on a suspect after finding a name tag in a bloody sweatshirt near the scene of a young girl's murder - but are later stunned when DNA reveals they've got the wrong man.

Police are met with a myriad of mysterious theories after a well-known Alaskan gold miner and political activist vanishes without a trace. Was it an alien abduction, a government conspiracy or cold blooded murder?