The Wormhole wrote:
And what the hell is the deal with Strax in Scotland anyway? Does he go there on his weekends off and spar with that big muscular dude?
Yes, that's Strax's idea of fun during a weekend off. What did you find confusing?
My thinking is that Hurt is portraying a "Dark Doctor", another version of the Valeyard, or perhaps the Dream Lord. Hurt isn't another unknown incarnation, but a representation of all the things that the Doctor hates about himself or regrets doing. He's the face of what he did in the Last Great Time War.