Miranda Krestovnikoff searches for the biggest sharks in British waters. (R)
BBC Two Northern Ireland
Neil Oliver discovers how flotsam inspired Columbus's accidental discovery of America. (R)
5/23 Victorian postcards reveal Rhyl's glory years to Hermione Cockburn. (R)
4/8 The team visits Cardiff marina, takes in the Gower Peninsula and finishes in St David's. (R)
19/23 In Waterford, Alice Roberts learns how to make glass from sand.
6/23 Miranda Krestovnikoff goes to Wexford in search of the rare white-fronted goose. (R)
BBC Two Scotland