Word Count: 16,395
Pairing/Characters: Doctor/River, Amy/Rory, Brian Williams, Kate Stewart, the Ponds, Clara
Notes: This started as an alternate retelling of "The Power of Three," but then turned into something more. The title comes from the musical phrase "ossia," which is a musical term for an alternate passage to be played instead of the original passage and "encore," which is a musical term for playing something again. Every positive number has two square roots.
Any recognizable dialogue in the story comes from the transcript of "The Power of Three," written by Chris Chibnall. This contains spoilers for a monster appearing in the finale of series 7b.
Summary: River thought of the look the Doctor had given her four days earlier, how sad he had been when he’d seen her with her parents. As much as she wanted to travel, as much as she wanted to throw him onto the closest horizontal surface and sate the itchy, crawly desire that had been getting worse, her gut knew the truth. Something had happened to either her or her parents, and her time with them was running out. She needed to stay.Ossia and Encore to the Square Root of Three