I know there are a few out here who follow this LJ, have read the Star Wars Expanded Universe, watched new Dr. Who, and like Doctor River Song. For that admittedly very small space in the intersecting circles on the Venn diagram,
Separated At Birth is my offering. I posted it on AO3, but that site is pretty wonky right now. But
here's the link in case it works better for you. For the first time I've just removed a review from the story because yuck.