Re Doctor/River meetings, it's also been pointed out that he hasn't given her the screwdriver yet, which suggests that that breaks the sequence.

Yeah, that was more or less what I meant, even if I hadn't said it, because I think he gave her the screwdriver at the picnic, though I could be remembering wrong.

Apparently they were going to age Mark Sheppard with make-up, and he said "Don't be silly, my Dad can do it."

(grin) Sensible fellow!