Series 1

1. "Dawn of a Culture"
2. "Years of Affluence"
3. "Secrets of the Gods"
4. "Heroes in Defeat"

This is a listing for The Celts (1978) and unrelated to The Celts (1987). 4 parts of 25 minutes, made by and only ever shown on BBC Wales, narrated by David Parry-Jones.

The Celts (1987); 6 parts, 55 minutes, made by BBC Scotland, shown nationwide, narrated by Frank Delaney.

Series 2

1. "The Man with the Golden Shoes" covers the archaeological and historical evidence for the Celts and the extent of their civilisation across the European continent, including the two core periods of Celtic culture (i.e. Hallstatt culture and La Tène culture).
2. "The Birth of Nations" shows the formation of the modern Celtic nations from the ashes of the Roman conquest and fall.
3. "A Pagan Trinity" discusses Celtic mythology, legend, and belief, and then the introduction of Christian faith to the Irish and Scots.
4. "The Open-Ended Curve" presents the distinctive physical art of the Celts, both ancient and modern.
5. "The Final Conflict" returns to history, presenting the conquest of the modern Celtic nations by neighbouring England and France, with a detailed review of the attempted destruction of the Welsh language, the Irish resistance and revolution, and the immigration of the Irish and others to North America.
6. "The Legacy" is a discussion on the degree to which modern people may view themselves as Celts, with examples of modern Celtic-inspired practices like military discipline and warfare, the Welsh Eisteddfod, modern Irish music and art, and the efforts of the Bretons and Cape Bretoners to preserve their native languages in the face of societal assimilation by their ruling nations. Some of this episode was filmed in Portmeirion, Wales and makes references to the 1960s series The Prisoner.