Tense undersea action on board a U-boat

Jubilation turns to horror and then terror in the tense opening minutes of the new series (featuring Stefan Konarske as Ulrich Wrangel, right) as a U-boat scores a direct hit on a cargo ship, only for the commander to realise that there were women and children on board and then spot a destroyer bearing down on them. ‘Dive, dive, dive!’ As in the first series, the critically acclaimed German drama is divided between events at sea aboard the U-boats and in the port of La Rochelle in occupied France. A third strand unfolds in New York. Sky, from Tuesday