The Doctor leant against the edge of the console, alone. Amy and Rory had disappeared off a few minutes ago, giggling, and he had decided to leave them to it. He looked around the control room again, deeply amused. Amy had declared that Christmas was to be observed on the TARDIS as well as outside it and had dug out some tinsel and strung it everywhere. The Doctor smiled and flicked a bauble gently. He could feel the calm, pleased hum of the TARDIS as he moved around the console, checking readings and carefully listing in his head the repairs he still had to make. He spotted a particular patch of the console and gave a slightly sheepish grin.
"Sorry old girl," he murmured, running his fingers lightly over it. "I'll try not to use percussive maintenance so much in future, hm?" There was a swell in the background humming in response, with (to the Doctor's ear) a slight tone of disbelief. The Doctor gave a soft laugh.
"Alright, alright. I said I'll try…" The humming evened out again. The Doctor let himself turn and fall into the seat, his feet up on the console. He smiled.
"Merry Christmas, dear," he said quietly.