Impossible Repairs: Panama Canal Railwaybr Panama Canal Railwaybr Impossible Repairs : Panama Canal Railwaybr Impossible Repairsbr Impossible Repairsbr Series 1 Episode 4: Panama Canal Railwaybr Going behind the scenes at the Panama Canal Railway. Big track repairs, massive machines, and unrelenting deadlines make this one of the hardest and most important maintenance jobs in the world.