Searching for a lost Japanese WWII submarine with 2 tons of gold is the premise for this Nat Geo documentary. Director of Photography Bill Mills spent six weeks in the mid Atlantic and over three miles underwater to capture never before seen images of the I-52.
Using the Russian MIR submersibles, Mills and the Nat Geo team tell the story of the sinking, discovery, and attempt to recover gold and other artifacts from this ship that is two miles deeper than Titantic.