This was a very good series with excellent character development and fascinating plot development hampered with a bad ending. The characters are well depicted and the viewer can easily be drawn in with their comraderie, humor and intensity. The story is full of interesting situations and locations. However, the real plot isn't revealed until the end of the 3rd to last episode of the 2nd season. This plot has an incredibly huge plot hole which completely fails to understand the concepts involved with basic aviation which turns out to be key to the "evil villain's" grand scheme. I liked the series much more before the end and dropped my score based on the rather childish ending. Well worth watching but almost just as worthwhile to skip the last 3 episodes of this 2nd season if you want to keep a high opinion of the whole.