The Lost Gods (2005) BBC

Episode 5: The Celts

The Celts believed in benign spirits and demonic forces, but made no churches or temples: nature itself was their cathedral. Kenneally visits ancient Celtic settlements in Austria, Italy and Greece. He explores the settlement of Castell Henllys in Wales, where the religion of the druids was broken by Roman military might. And at Newgrange, Ferrycarraig and Dun Aengus in Ireland, he reveals how the Celts came to adopt the Gods of those who had preceded them.

Is there a God? It's an eternal question that all ancient civilizations have answered. Not with just one God, but with hundreds of them. Bringing them to life on earth, they fashioned their images in wood, paint and stone. And built spectacular holy shrines to house them.

So what happened to these Gods? Do powerful faiths just vanish? Can Gods die? Are these once sacred sites the final resting places for long lost religions? And how can people who believed in so many deities for so long come to believe in just one, Christians, Jews and Muslims alike, and sweep the others to extinction? To answer these questions, Smithsonian Channel travels back thousands of years to the rise and fall of six ancient civilizations, the Egyptians, Greeks, Celts, Romans, Mayans and Incans, to finally reveal the mysteries behind their ancient gods. People of all devotions will be enlightened by this journey through faith and time.

Episode 1: The Egyptians
Episode 2: The Greeks
Episode 3: The Romans
Episode 4: The Maya
Episode 5: The Celts