I am neither learned nor experienced when it comes to hijacking, but I though the show was very good. Practical, thought provoking and for the most part realistic. My middle daughter and I watched the show together and she focused in too much on the calm and obviously trained presenter. I think in real situation, it is going to be much more of a panic situation; you are unlikely to have someone on board with that degree of demeanor. The other minor criticism, was that little was presented in terms of alternative actions, if the first idea/plan did not work as presented.
I will definitely watch the show again and feel of the various shows that have been presented on survival, it ranks up there with the better productions (at least based upon the first show), time will tell.
Pete