Well, here we are at the end of the “Doctor Who” season. In this finale we got a lot of technical and plot stuff that doesn’t survive a whole lot of logic, but the emotional and character beats are truthful and the season’s overarching themes (Doctor as commander of soldiers, “Am I a good man?”, Clara as Doctor-in-training, and the lies—oh, all the lies) are brought home strongly. How does it all fit together? Why should we never trust a hug? And what does Nick Frost have to do with it all? Let’s break it all down one final time...