In 1947, a B-29, on a secret reconnaissance mission over Russia, becam e lost over the North Pole. The pilot made an emergency landing in Gre enland, and the crew was rescued. This program follows pilot Darryl Gr eenamyer as he heads an expedition into the Arctic to rescue the downe d B-29. Battling unpredictable weather, an unforgiving landscape, limi ted equipment, illness and fatigue, his team rushes to refurbish the p lane before the harsh winter sets in. The second half of the program f ocuses on the Titanic's sister ship, the Brittanic. Few people realize that the Titanic had two nearly identical sister ships, the Olympic a nd the Britannic. The Olympic had a successful career as a liner until she broke up in 1935, but the Britannic met a fate almost as unlucky as the Titanic's. Serving as a hospital ship in the Aegean, it was eit her torpedoed or struck a mine on November 21, 1916, and sank within a n hour, yet only thirty of the crew of 1,100 died. Nova joins the sear ch for the wreck of the Britannic and explores the evidence of its dra matic end.