Scientists examine evidence about Neanderthals that sheds light on the hominids, who died off some 30,000 years ago. See the 2010 reconstruction of the Neanderthal genome, which posits that modern humans and Neanderthals interbred.
The 1932 kidnapping and killing of Charles Lindbergh's 20-month-old son is revisited. Investigators employ forensic and behavioral science techniques in an effort to learn what happened to the baby and why.