Wouldn't this be a great idea for the writers to put into the show before it ends? As Ben, Richard, and Miles are making their way to the barracks, they stop by Henry Gale's balloon. Ben says he remembers this place. Miles then asks what he was doing here before, and then we see a flashback as to how Ben knew about Henry Gale and his balloon. That would be an easy way to answer one of our questions that we have always been wondering. What do you guys think?