Kingdom of darkness

What's the connection between a dig in Alexandria for Alexander the Great's tomb and a wanted Nazi war criminal? Nina and Eddie about to find out as they go on a search across the globe, from Egypt to Argentina and Italy to Iran, to find the truth. They have located the most exciting archaeological treasures the world has ever known - they have found Atlantis and walked in the Garden of Eden, they have wielded Excalibur and seen the vast sums of gold in El Dorado. Could they now be about to find the greatest prize of all - the secret to eternal life?