[Calvin Locke]

In the Swedish detective series "Wallander" (not BBC), they did a show on the incident, but it was a US sub that was trapped and helped to escape by elements in the Swedish government, resulting in the death of a SW diver placing beacons for the sub.

Years later, a fisherman pulls up stuff...

[SevenofNine]

Was orgiianl you see on MHZ worldview network I think I remember that episode