Originally Posted by
Shrike:
“The long faced chappie on the book's cover was the Roman Commander who came back from a week away to find "Cleopatra" had taken over his camp - even though she "is in Egypt - and dead".
”
Please take another look. There is indeed a character on the book cover who is the Roman (I assume) General who has been away. But, there is another, younger character (tall, thin and with a Rory-esque nose) on the cover who looks quite like Rory.
It seems to me unlikely that the production team would go to all the trouble of manufacturing a badge for Rory, but then make such a fundamental error in so doing. But more importantly, during the Doctor's"What did I see?" sequence, the camera pans down to the badge and makes a point of showing it. We have already seen Rory by this point (when nurse Rory is having a conversation in the hospital with the medical doctor), We know his name and we know what he does for a living - so there is no good reason to show us the badge.
For that episode we are supposed (I think) to be on earth after the universe has been destroyed and is being kept going with the burning Tardis. There are no stars in the night scenes in that episode. I also think it is interesting that when the spaceship first appears in the sky it looks rather like the burning Tardis in the final episode - when Amy asks what it is, the Doctor replies it is being "filtered" by something or other (I can't remember the exact speech).
I think that many of these things are put in there deliberately for us to ponder, without there necessarily being any intention to explain each and every thing to us - one of the functions of the writer is to make us fill in some of the gaps ourselves.
Having said all that, I think the sixth person (to return to the original post) is a member of the crew who is there by mistake.