Excellent fotage and editing. The stories are supposed to be all real facts such that you have not clearly to expect any fictional plot to develop. At times it gets a bit slow and some parts sounds a bit grandiloquent and excessively dramatic.
I don't know if it could be considered a documentary serie. Personally I would have appreciated more technical information and divulgation both about the medical activities, the geography, the story of the area and something more about aviation matter.
Review of The Horn
