On the 26th September 2022, a 2.03 a.m. the first of two explosions were registered as seismic activity on the Baltic sea floor near the Danish island of Bornholm, followed at 19.03 by a second explosion. The activity was recorded as far away as Norway and Germany, as well as Sweden. At the same time the pressure in the pipelines dropped drastically. Europe’s two major gas lines had ruptured and Siberian gas was bubbling to the sea surface. The images were dramatic – never before had an underwater gas pipeline been bombed. But who was behind it? Ukraine? Russia? Intelligence agencies? This documentary pulls together the latest research for a deep dive into this fascinating spy story.