Someone anonymously sent me this prompt on Tumblr: could you do a songfic featuring any pairing? The answer is yes, I can do that. The song I've chosen is If We Ever Meet Again by Timbaland ft. Katy Perry, which, to be fair, could apply to any number of pairings in Doctor Who. However, I've picked the Tenth Doctor and River Song because I think this song works well to describe their relationship during Silence in the Library/Forest of the Dead.

What is somebody like you doing in a place like this?
Say did you come alone or did you bring all your friends?
Say what's your name? What are you drinking?
Think I know what are you thinking
Baby what's your sign? Tell me yours and I'll tell you mine
Say what is someone like you doing in a place like this?

The Doctor groaned in frustration. He was trying to get these people to leave The Library. Once they did, he and Donna would be able to go back to the Tardis and leave this place behind. Even he knew it was really not safe and wasn't going to risk it. He was only slightly annoyed that they were archaeologists. What frustrated him most was the fact they were seemed to be following the woman who claimed she knew him. He felt a connection to her but wasn't willing to probe that until his questions about her identity had been resolved. Who was she? How did she know him? What was she doing here?

Do you come here much? I swear I've seen your face before

It was breaking her heart to see the man she loved with no recollection of who she was. At first, she thought it was just for show and he was trying to be professional and do his job, so to speak. And she let him do that because she liked seeing him act like that. But then it became clear that he honestly didn't know who she was. He was trying so hard to hide it because he must have known that it would upset and distress her. He even let her stroke his hair for a moment or two. To River, he looked so familiar but it was obvious that the man in front of her wasn't the man who loved her. Not yet, anyway.

Baby tell me what's your story?

Her blue book was lying next to him, just an arm's width away. He could just reach out and read it. Although perhaps not now, he needed to concentrate on finding out about CAL. But he could slip the book into his pocket so he could read it when he got back to the Tardis. Part of him knew it was wrong but he was immensely curious about this woman who appeared to know so much about him. He hesitated for a split second too long. River caught him and took the book out of his reach.

"Sorry, it's against the rules." She looked a little sheepish.

"What rules?"

"Your rules."

"Who are you?" The Doctor asked for what seemed the umpteenth time that day. He really wanted to know her story. But it seemed he wouldn't get much of a chance with everything else that was unfolding at The Library.

If we ever meet again, I'll have so much more to say

Later, much later, the Doctor sat on the floor, one hand chained up high. His mind replayed those last moments. Waking up to find River in that seat was bad enough. Their final conversation as she attached herself to the mainframe had chilled him. Their future, no, his future, her past, must have made a big impact on River for her to sacrifice herself. He wondered why she would do that; he wasn't worth it. But clearly, River thought he was. Then, there was a flash of light as the countdown reached zero. He tried to force himself to keep watching but the light was too bright. He was numb with shock and horrified about what had unfolded.

As he sat there, waiting for someone to come and release him from the handcuffs but not really caring how long they took, he made a promise to himself. For River. He would never rewrite their time together. He knew now that he would see her again, even though it would more than likely be out of order. But he wasn't willing to see her again so soon. Perhaps after Donna had left, which she would do, because everyone leaves him eventually. The Doctor decided that next time he met River Song, he was going to tell her about the promise he had made. But, would he though? He now understood how River must have felt - she knew so much about their future but couldn't say because it hadn't happened for him yet.

"Oh, River. I have so much to talk to you about when I next see you. But I don't know if I can say it."