U.S. cable's National Geographic Channel gives viewers unprecedented access to the inner sanctum of Vatican City in a program narrated by Martin Sheen.

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The one-hour special "Inside the Vatican" Sunday features the process of selecting a new pope as well as the activities leading up to the ordination of nine new bishops and the Swiss Guard's oath of fidelity to the pope.

"Though many people are familiar with the Vatican, they really do not know all that it embodies. This special goes beyond the functions and the extensive history," John Bredar, executive producer for specials and event programs, National Geographic Television & Film, said.

"Our cameras see this spiritual place through the eyes of the people and their services to the pope and the church."

"Inside the Vatican" moves through the ornate halls and seldom-seen back streets of the holy city to encounter some who live and work in the Vatican including: tailors, soldiers, gardeners, phone operators, printers and police officers. Each person tells part of the story of the Vatican, a place that according to Roman Catholic tradition traces its history to the martyrdom of the Apostle Peter.