So far, much of the chatter about the Impossible Astronaut seems to have been about the Silence, with most reviewers saying ‘obviously the Doctor won’t die REALLY’.
The cast throw ‘is he a Clone or a duplicate?’ into the conversation, and Canton Everett Delaware (the third) counters by saying ‘that surely is the Doctor, and he surely is dead’.
The older Doctor arrives in a remote spot, but by car. No TARDIS. Hmm.
The Doctor under the skirts at the beginning is reported by Amy to disappear in a ‘flying globe’. This is clearly not a TARDIS, and sounds more like a Sontaran ship, or (given a little leeway) the ship that was on top of the house in last series’ ‘The Lodger’. (I may have spotted a hot air balloon in the book… first recorded flight was 1793, but it wouldn’t have been mysterious, just a larger balloon than anyone had seen before)
Why is this Doctor trying to draw attention to himself? It would seem as though he was stranded and wanted to be rescued, except that:
a) He had plenty of of other past companions to call upon.
b) He knew where he had already been.. so could have hid behind a tree and stowed away in the TARDIS for a bit
c) He’s having fun doing it.. thats like making an SOS sign on the beach using chocolate cake. Possible, but not the most efficient way to do it.
Anyway, in summary, to me it looks like there are at least two actual Doctors in TIA, rather than one at different points on the timeline. (They did that in Flesh and Stone)
(picture from www.LaurelandHardy.org, which actually turned out to be very interesting!)