Rose's future with the Doctor.

"Ladies and gentlemen of the court of Versailles VI, allow me to present... Rose Tyler."

The Doctor bowed. Rose Tyler stepped forward, looking nervous, brushing down the front of her gorgeous court dress with the puffy sleeves and lace-lined bodice. "Doctor," she hissed. "They're all looking at me."

"Of course they are. You're a diplomat." The rococo ballroom, with its gilt and mirrors and crystal chandeliers, sprawled on for miles. It was packed full of futuristic courtesans, all decked out in the fanciest fashions the planet Versailles VI had to offer, drinking and dancing and celebrating. Hyperstring quartets played in the corners. Waiters bussed around flutes of sparkling space champagne. All eyes were turned to Rose as she stood on the grand ivory staircase, the Doctor holding her arm. "They want to know what you're going to do."

"What am I going to do?"

"Just smile and take it easy. The dress will do most of the work. You took the one I told you, didn't you? Seventeenth from the back in the TARDIS closet?"

"Did you say seventeenth?"

"We're here to broker a lasting peace between Versailles VI and Buckingham III. It's important you don't make any faux pas."

"If I took the sixteenth, would that be a problem? They're all the same, aren't they?"

"The sixteenth?"

"Er..."

"You're sure it wasn't the fifteen? Or the eighteenth?"

"Um..."

"Well, it should be fine. It'll probably be fine. I don't think the atmospheric reaction with Betelgeusan spider silk will..."

Rose's dress exploded into colourful dust, leaving her stark naked on the staircase in front of everyone. Her mouth fell open. All the string quartets stopped playing at once. There was a polite silence.

"Ah," said the Doctor. "Well, don't worry. I know how to fix this." He raised his voice. "Don't worry, everyone! She's from a planet of nudists! This is how they normally dress!"

"Um, Doctor..."

"There. Now all you have to do is stay naked for the duration of our week-long stay, and nobody will suspect a thing."

"Uh..."

"Of course, if you put clothes on even once, they'll know I lied and the diplomatic mission will be ruined, leading to centuries of interstellar conflict. And you still have to do all of the very, very public events."

"I," said Rose, her face going very, very red as ten thousand alien eyes fixated on her bare breasts and exposed pussy. "You. I..." Her hands crept towards her body. The Doctor swatted them away. "Can't cover up, either," he said. "Now it's off to meet the Queen of Space and her entourage. They'll be pleased to see you. This nudism thing could work out rather well."

Clara was laughing fit to burst. The present Rose watched with her mouth open, her cheeks bright red in sympathy with her future self as the unfortunate, blushing girl was paraded nude through a crowd of giggling, teasing courtiers. "Clara! Did you have to?"

"Oh, I absolutely did. Your double's going to have some very embarrassing adventures. I had to make sure Rose Tyler always loses her clothes, no matter what dimension she's in. Can we see what my double gets up to?"