Colditz Castle was used by the National Socialists to hold the "bad guys" (who regularly wanted to flee from other camps). At all times, the guards outweighed the number of prisoners, and as some political prisoners were held there, they were closely monitored. But if you put all these people in one place and they all try to escape, then shit happens.
One of the most known movies produced by Guy Hamilton is The Colditz Story. First of all, I need to say that The Colditz Story is not like the other Drama movies made according to the usual scheme. The Colditz Story has everything what makes any new movie a good movie. Lionel Jeffries and John Mills in a Drama movie, what more could you want? The movie was made in United Kingdom by a great director. Feel free to hit the play button and enjoy the movie, the great actors play and all other things that make the whole movie as great as it is.