Murder by the Sea (2018 - 2025)

Looking at the case of the 'Vampire Killer' Mathew Hardman, who cut out the heart, and then drank the blood of 90-year-old Mabel Leyshon of Anglesey in 2001.

When Joan Stirland's son Michael O'Brien murdered Colin Gunn's nephew in 2003, she and her husband's lives were in danger. They went on the run, but their son's past soon caught up with them.

The case of Paul Longworth, who murdered his wife by strangling her with sailing rope and arranging her body in their home, then claimed it was suicide.

The case of Steven Grierson, a serial killer who murdered four teenagers and terrorised dozens of others, becoming known as the Sunderland strangler.