The perpetuation of war, violence and death, to fund a capitalist corporation - oh, this is the brilliance of a Moffat script. The value of weapons, and how they are sold to continue to generate this profit provides much to think about and always politically relevant. In most stories, this will be the extent of the brilliance and genius, but Moffat had to add many more layers to this.

The concept of faith, believing without knowing, and how valuable this is, is a meaningful dimension to digest throughout - faith in the Church and their religion, and faith in the war - brilliant to consider, and another deep layer throughout this story.

The slower pace due the Doctor on the land mine allows for these ideas to be explored with value and merit, without rushing through superfluously. But to manage to maintain a tension and threat, which keeps you drawn in throughout a full story, with the Doctor immobilised the whole time, it needed the pen of Moffat to write.