And there's a subtext I didn't see!
I joined in the discussion about the last episode because I thought the episode itself had a lot of subtexts, allegories, satire and other references.
I was drawn to the epsiode because of the 'personal moral dilemma' angle, but appreciated the political/democracy subtext. Some of the comments on the discussion abou the episode made me think even more about the 'moral dilemma' angle. And the responsibilities and burdens of 'the authorities'. Among other points.
I thought it was a a fascinating and thought-provoking discussion, even at the points when I felt that some of the things I had said were being misunderstood or misrepresented.
Now I find that there was a 'who it was wot wrote it (Moffat v RTD)' subtext too

.
TBH, I find that simultaneously explains some of the things I didn't understand about the discussion, and takes away from it a bit

. It's very sad to think that some of the arguments might have been coloured by the Moffat v RTD subtext. They were such good arguments (in the 'debate' context).
And, that subtext makes me annoyed that my innocent name-checking of the writer of TBB may have been misconstrued (misunderstood, misrepresented etc).
However, as far as analysing stories and themes and repetitions is concerned, I do remember that exam questions on literature often ran along the lines of: "Considering the work of x, he/she had a particular interest in the themes of y and z. Discuss, using examples from two or more of his/her plays/stories/poems".
If I could time travel back to my school/college days, I would kill for the opportunity to use some of the Doctor Who episodes to answer a question like that!! (Depending on the theme, of course)