Columns: Series No. | Episode No. | Title | Directed by | Written by | UK Ratings (BBC2 Rank) | Original air date
7 | 1 | "The Mysteries of the Isles" | Various | n/a | 2.88m (2) | 13May2012 | 7 | 2 | "Life Beyond the Edge" | Various | n/a | 2.54m (2) | 20May2012 | 7 | 3 | "The Hidden History of Harbours" | Various | n/a | 1.94m (7) | 27May2012 | 7 | 4 | "Peril from the Seas" | Various | n/a | 1.82m (10) | 3June2012 | 7 | 5 | "The Riddle of the Tides" | Various | n/a | 1.99m (8) | 10June2012