Great movie. Great acting. The plot is fantastic. I give this movie 5 stars. It gives you a great story from only the side of the emergency call centre operator and makes you feel as though you are in it together with him trying to figure everything out. I am simply jealous of people that haven't watched this movie yet as I'd like to start the journey again. Very simple yet very good. I read a review from a Karen questioning his actions in the call centre and how he was able to get away with acting up and calls monitored etc... but the movie wouldn't be quite so good if the call came in, he became passionate in an attempt to save persons involved in the call then he got suspended with immediate effect. Basically each part in the movie is significant and works very well. Enjoy as I did