Description: Jack Hardy (David Jason, A Touch of Frost) is the sole survivor of a mysterious submarine disaster in World War II. Now, in 1981, the ill-fated submarine has resurfaced, miraculously intact, but what s waiting for the new crew under the grey waters of the Baltic Sea turns out to be much worse than the Russian submarines they were expecting. Hardy fights for his life as the forgotten events of 1943 start to have deadly consequences for the modern day crew of the submarine. Wherever this submarine has been all this time, it s brought some bad luck back with it. A British Sub goes missing at the end of the war leaving only one crew member surviving. Everyone believes it lost to the bottom of the Baltic Sea, then 40 years later it reappears without a crew. The British government send for the one surviving crew member (David Jason) now a marine biologist. With a new crew and Jason then proceed to trace the last know happenings on the sub. But this submarine has a life of its own and the new crew soon start showing characteristics of the old crew.