Gillian Burke finds out how our marine industries are stressing sea creatures, Steve Brown uncovers the historic secrets of seabirds in Yorkshire and Chris Packham meets a retired couple who are contributing to shark science.

'It all comes out in the wash!' – Steve Brown finds out how washing our clothes is harming our marine life. Gillian Burke will look at why the fish and chips supper has changed over the years and which species of lobster is making a comeback. Plus Chris Packham finds out why one man is fascinated by 'the Christmas Tree fish of the sea.