I have read some of the other lower rated reviews. I have never been held at gun point or in a hostage situation, so I couldn't say what is realistic and what is not. The show is definitely entertaining and way more believable than being trapped with Snakes on a Plane
The plot twist in the beginning was when the pilot attacked the co-pilot and was the pilot part of the hijack crew. The camera keeps focusing on different characters on the plane, so you really don't know if there are additional hijackers on the plane.