In "Quest for the Phoenicians," three renowned scientists, National Geographic Explorer-in-Residence and oceanographer Robert Ballard, geneticist Spencer Wells and archaeologist Paco Giles, search for clues about the Phoenicians in the sea, in the earth and in the blood of their modern-day descendents... Ballard looks at ancient shipwrecks along Skerki Bank off the island of Sicily... Paco Giles excavates a cave at the bottom of the rock of Gibraltar... Spencer Wells collects DNA from a 2,500-year-old Phoenician mummy's tooth, to extract its unique genetic code and compare it with DNA samples collected from men and women from Lebanon to Tunisia.