A new show out on BBC Two. So far the first episode is pretty good and worth a look of you have the means to view/ "acquire" the episodes.
http://www.bbc.co.uk/programmes/b02trph8
http://www.bbc.co.uk/programmes/b02trph8
Presented by Jules Hudson, the series follows underwater explorer and historian Ian Lawler who has compiled a unique map charting the locations of many of the wrecks. 4,000 ships were sunk during the Battle of The Atlantic with scores of unnamed wrecks still littering the seabed. With the help of naval historian Randy Papadopolous from The Pentagon and German U-Boat expert Axel Niestle onshore, Ian and his team of expert divers descend into the depths to unravel some of the lost secrets these wrecks contain and bring back stunning footage from the seabed.