Explores sleep deprivation and sleep disorders. Including reports on a Billings, MT college student convicted of involuntary manslaughter; and a woman killed when a man who admitted he had not slept for 30 hours fell asleep at the wheel.

A couple is attacked in Coral Gables, FL in 2004; killing the wife and seriously wounding the husband. Authorities eventually zero in on their troubled son with a possible motive.

An investigation into the 1999 scuba diving death of Shelley Tyre while on vacation on the Caribbean isle of Tortola.

When little Madeleine McCann disappeared from her parent's hotel room in Portugal, it quickly became international news.

It's a case that just didn't seem to make sense -- even to investigators, who called it one of the strangest they'd ever come across.

A baby missing for over 30 years reunites with her mother and two tenacious siblings she's never even met. Then a priceless Super Bowl ring lost in the ocean is found 40 years later; and a miracle 160-million-year-old treasure recovered by a 5-year-old.