As Big Blue Week continues, this is the last chance to join Hugh Fearnley Whittingstall and the team in their celebration of the UK's marine life this summer. In this episode Hugh focuses on the UK's grey and common seals. Our archipelago is home to one of the most significant grey seal populations in the world - but can Hugh meet them close up? Nearly half of the world's grey seals choose to live in the UK. Hugh heads to the island of Lundy to find out why grey seals are so attracted to life in the UK. Lindsey Chapman is helping to return a stranded seal pup to the sea, and wildlife cameraman Richard Taylor-Jones is tracking down a group of common seals living in a surprisingly urban setting. Summer is pupping season for the common seal, but can Richard get a shot of these shy and skittish creatures? There's also a final chance to go behind the scenes with Matt Baker et al, as Big Blue Live welcome an extraordinary gathering of animals in Monterey Bay, America.