1. Liverpool

Adrian Chiles, Mehreen Baig and a team of experts explore four spectacular coastlines linked by the Irish Sea and meet the people who call them home. In this episode, they visit the Merseyside coast.

2. Anglesey

Adrian and Mehreen arrive on Anglesey – the largest island in the Irish Sea - via the Menai Strait.

4. Dumfries and Galloway/South Ayrshire

Mehreen takes to the skies with a former RAF fighter pilot who is now using his flying skills to document the large-scale pollution that is hidden along the coastline