All four episodes of the nature documentary presented by Siân Phillips which explores the abundance of nature and wildlife found along the Welsh coast. As well as following animals including Atlantic grey seals, compass jellyfish and catsharks, the series also considers the challenges currently facing marine environments in Wales and across the world.
The episodes are:
- 'Coasts: Life On the Edge'
- 'Shallow Seas: A Mythical Kingdom'
- 'The Deep: Into the Unknown'
- 'Heroes of the Celtic Deep'