AllMovie

The White Star Line owned three ships, one was the Titanic. This Nova film features her sister ship, the Britannic, in Nova: Titanic's Lost Sister, which was just as luckless. When the Titanic sank, despite its claim of being unsinkable, the Britannic was overhauled with the new, more stringent ship regulations in mind. However, in 1916, the Britannic sank as well. Did a German torpedo cause the demise of Britannic? Or did the ship hit a mine? Explorer Robert Ballard looks for answers using a debris field theory, in which debris sinks in a certain pattern depending on the current. Determining the point of impact would allow Ballard to find the true reason for the loss of the Britannic.