Season 4
E1.The Loch Ness Monster
E2.Who is the Zodiac Killer?
E3.The Assassination of JFK
E4.The Lost Colony of Roanoke
E5.The Phoenix Lights Phenomenon
E6.The Ark of the Covenant
E7.The "Missingest" Man in America
E8.Blackbeard's Lost Treasure
E9.Decoding the Mysterious Antikythera Mechanism
E10.The Puzzling Pyramids of Egypt
E11.The Hunt for Stolen Nazi Treasure
E12.The Deadly Bermuda Triangle
E13.The Search for Noah's Ark
E14.Who is D.B. Cooper?