Newly unsealed records from a Victorian madhouse finally reveal Jack the Ripper's identity. Potential Yeti DNA gives clues about the mysterious beast. The shocking interruption of a live broadcast by a masked man has the world asking about Max Headroom.

In the 16th century, settlers of Roanoke vanished without a trace. New evidence finally reveals what happened. Archaeologists investigate what destroyed the original Sin City, Sodom. A bold new theory suggests Stonehenge may be more than it seems.