Part 5 of six: British archaeologists Martin and Birthe Biddle search for “The Tomb of Christ” underneath Jerusalem's Church of the Holy Sepulchre. The Roman emperor Constantine built the first shrine over the spot where he thought (and the Biddles think) Christ was laid to rest before the Resurrection. The site is controversial because it is within Jerusalem's city walls, contrary to Gospel accounts. But, says Martin Biddle (noting that the city walls were moved in AD 41): “It is the city which has moved.” Liev Schreiber narrates.