Doctor Who: Still To Be Resolved...(Part 1)

Ever since his 2008 two-parter Silence in the Library/Forest of the Dead, Steven Moffat has had a long masterplan of where he has wanted to take Doctor Who, and next Saturday with the mid-season finale A Good Man Goes To War we might just start getting answers to some of these half-decade spanning questions that have been raised. Here are just a few niggling dilemmas:
WHO IS RIVER SONG?- Key to Episode 7 is the revelation of River Song's identity, and so far what we know is that she knows the Doctor's true name, finds it natural to kiss him at the end of an adventure and for some reason has been placed in prison for killing "the best man [she]'s ever known". Now, given that River has seen the death of the Doctor (i.e. when he was shot by the Impossible Astronaut), it isn't out of the question to think that she might have a reason to cause it in his future that the Time Lord finds a way out of but so that the timeline is set in motion first, thus forcing her to be taken to prison- but a future prison, so does she turn herself in...?
WHO ARE THE SILENCE?- Perhaps we'll see them again next week, perhaps not, but there was a definitely a sense that the Silence, who somehow destroyed the TARDIS last year specifically on Amy's wedding day and we were told would fall in Series 6, were beaten too easily and in fact had bigger plans in motion. I have a feeling given how crowded next week's line-up looks we may not see them again until the second finale (the big one, Episode 13, which will air in October), but that doesn't mean their presence won't be felt in Episode Seven...
WHAT HAPPENED IN THE LODGER?- No, it hasn't taken me just under a year to work out the relatively simple plot of James Corden's great Who episode, but we saw 'someone's attempt to build a TARDIS' here that had crashlanded, only for it to teleport away...and then the Silence had a ship just like it! Once again, I'd be surprised if we find out the secret of the new time ship in Episode 7, but expect it to crop up again in the second half (and bear in mind one of the later stories does feature Corden again...)
Have a ponder on all that, and we'll be back looking at Amy, Rory's various deaths, the death of the Doctor, the conclusion to Episodes 2 & 6 and lots more later this week!