The Rising Tide (Christmas Special) (S12E05)

DCI Vera Stanhope is captivated by the beautiful tidal island of Lindisfarne, where a circle of lifelong friends gathers every five years to celebrate their lasting connection. However, as the tide rises, buried secrets start to emerge, putting everyone at risk. With the help of her dependable team, including Detective Sergeant Aiden Healy, Vera delves into a perilous situation filled with danger and deceit. They must untangle the complex web of lies before another disaster strikes.