Karen Pynchon, author of "Kings of Their Ocean," dives into the history of tuna fisheries. Lucy Hawkes from the University of Exeter reveals the fascinating return of bluefin tuna to UK waters. Jess Rattle, head of investigations at the Blue Marine Foundation, discusses the urgent need for sustainable fishing practices. Chris Berry, author of "Tunny," shares stories of tuna fishing's impact on Scarborough. Together, they explore bluefin's unique biology, conservation challenges, and the cultural significance of this prized fish.