Howling:Off-screen Ten/River meetings.
I remember shortly before series 5 aired, Steven Moffat implied extremely heavily that there was off-screen Doctor/River meetings, which would have been when Ten was traveling alone. It was also implied in The Time of Angels, the Doctor notes that "we keep meeting in the wrong order" as if he has met has several times now. He wouldn't say that if he had only met River once, and she was at the end of her timeline. His dialouge would suggest he met her several times now, all out of order.
That, and Moffat's comments basically say the same thing. He said something like, "Ah, but who said it's the SECOND time? in refering to the first 4 episodes of series 5. This would obviously refer to the Doctor "we *keep* meeting in the wrong order" dialouge - it's not the second time he met her. There was a large chunk of him traveling alone, too.
Things to note:
It was already implied by the Doctor and Moffat
River recognises Ten very clearly - must have met him before in her timeline (there was a chunk where he traveled alone and got upto things unseen)
I don't remember clearly but upon learning that the Doctor hasn't experienced the Crash of Byzantium (The Time of Angels/Flesh and Stone) yet in his timeline, I believe she places the Picnic of Agard before the Crash of Byzantium in his timeline.
So, she places the picnic before the Crash of Byzantium in his timeline, meaning he had to have experienced that off-screen. There was chucnk were Ten had off-screen adventures. She clearly recognised Ten. The Doctor heavily implies he has met her several times by during the Crash of Byzantium (explaining why I'm sure she placed the picnic before the crash in his timeline). Moffat already implied the same thing about off-screen meetings.
Without a doubt, there has been some off-screen meetings, and Asgard is one of them. Or they may only be one-screen meeting, but his dialouge would sughgest he has met her a number of times. "We keep." He seems to know River far too well in her second appearance to have only met her once before.
To the point, there are far too many mentioned River adventures too all be seen, so some will naturally be off-screen. Delton Menace#
