I bought this film on a whim while browsing and I am so glad that I did. It is an unexpected gem. For me its rawness adds to the immediacy and incredible tension that is maintained throughout. In fact I was sitting on the edge of my seat for almost the entire three hours of the film. I cannot imagine what it must have been like having to wait a whole week for the next episode when it was originally broadcast.
Most of the action is outdoors and the locations are perfect; all with excellent vehicles, planes, armaments, buildings and steam trains; costumes, props, extras; everything brilliantly well done. The acting is superb.
Although one reviewer's comments imply that around 100 minutes have been cut from the original serialised version, this film did not come across as being at all episodic. To me it seemed to be extremely well edited into a very coherent story.
A story of the toughest of the tough, yet while struggling, resisting, fighting for their lives, the characters also show the greatest humanity and comradeship. This story has everything: heroism, integrity, betrayal, love and plenty of action, all at a very personal level. One of the best war movies I have seen and one I shall definitely watch again.