A specialist team unearth a long-lost tomb in the shadow of the pyramids, as archaeologists hunt for remains and explore hidden tombs in the Valley of the Kings. Why did the great pharaohs of Egypt abandon the pyramids of Giza and choose a secret cemetery in the valley for their burial ground? An extraordinary discovery is made in a rare tomb 4,500 years old, while a team from the University of Basel in Switzerland take up the hunt for clues to identify human remains found in looted tombs.

This episode follows archaeologists hunting for Cleopatra's lost tomb. Underwater archaeologists dive the Mediterranean to explore the sunken ruins of ancient Alexandria.