2. Cold Blue

Kay Weden finds her mother inexplicably murdered inside her own home. Then, investigators discover the frozen remains of her boyfriend in the icy peaks of Blue Ridge Mountains. Only by speaking with Kay do investigators realize she's being stalked.

3. Frozen Waters

A woman and her two young children go missing, then two other boys also disappear, prompting investigators to ask whether there's a serial predator on the loose in the wintry landscape of rural Missouri.

4. Icy Depths

Noel Alkaramla, 21, vanishes just before Thanksgiving; investigators interrogate Noel's girlfriend and many others, but the answers can only be found in the icy depths of the Hudson River.

5. The Killing Field

A teenage couple disappears from a Colorado neighborhood in the middle of winter; their car turns up abandoned and burnt in a field and everyone is looking for answers, but the winter's thaw reveals the truth.

6. Nightmare in North Dakota

After a blizzard, a son visits his parents, only to find them murdered. A peculiar local might know what happened during the snowstorm.