| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S01E01 | Coasts: Live on the Edge |
October 12, 2021
BBC Cymru Wales
|
60 | |
| S01E02 | Shallow Seas: A Mythical Kingdom |
October 12, 2021
BBC Cymru Wales
|
60 | |
| S01E03 | The Deep: Into the Unknown |
October 12, 2021
BBC Cymru Wales
|
60 | |
| S01E04 |
Heroes of the Celtic Deep
series finale
|
October 12, 2021
BBC Cymru Wales
|
60 |
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No artwork of this type.