Herself

Clara let out a groan of mixed frustration and embarrassment; she didn't know how long she'd been doing this, but it had been far, far too long either way. Wandering the four dimensional labyrinth of the TARDIS, naked, bare feet against the floor and slender arms the only protection to her modesty.

Not that it had helped much. She'd hastily darted past more people, a wide variety of old-fashioned outfits and utterly scandalised expressions at the sight of her, men and women and at least one robot dog, and on one occasion she'd found herself in front of a swimming pool apparently full of merpeople.

Which raised a lot of questions to ask the Doctor. But that would entail actually finding him. Clara flushed, hurrying past a doorway beyond which a dark-haired, scruffy looking figure was playing the recorder. There was no sign of the Doctor anywhere!

Just way, way more people than ever should see her naked.

"Look," Clara said desperately. "I'm going to need to at least sleep sometime, you can point me back to my room now. If you're the Doctor's, you have to be nice sometime, right?"

She darted around a corner, and almost ran right into a trio of short, squat, potato headed aliens. The frontmost raised some kind of stick.

"For the glory of Sontar!" it hissed.

Clara squealed and, stumbling, whirled around and went right back where she'd come from, blush deepening. What the hell?!

She slumped against a wall, a whimper escaping her lips. Ok, so the TARDIS apparently really didn't care about letting her get dressed when it could expose her to all manner of things from the TARDIS's past and future. That was... not great.

She'd be safe, hopefully, that much she felt like she could be sure of. If nothing else the Doctor would get mad at the bloody box if she got hurt, but humiliation apparently was fair game.

Clara groaned, arms dropping for a second as she fell back.

A door on the wall opposite her slid open. Was- was that a room?

Nervously lifting her arms, Clara stumbled forwards, and then froze on the threshold.

It was a room. It was also occupied. By her. A lot of her, all in identical states of undress. There was a bunkbed with a nude Clara on top and two in the bottom, a hammock strung up between pillars with yet another nude Clara thumbing through a book, a cabinet with two nude Claras playing cards (one of which seeming rather bored), half a dozen more sat along a wall...

And that was just in her immediate vicinity. The room stretched out, sprawling.

Clara squealed.

"Ooh! You're number one, right?" a nude double hurried up to her.

"I- I- uh- huh?!" Clara managed.

She still kept her arms crossed over her front, despite how brazenly the other her displayed, well, everything. At least in this room, she supposed, there was no one to see but... well... her.

How was she even meant to react to this?!

"That's a yes," the other Clara said. "Don't worry, I remember."

"We all remember!" shouted a Clara from the top of the bunkbed.

"What-" Clara squeaked.

"TARDIS did give us a room to sleep in," the other Clara said. "And she does let you get dressed again. But the next time you take your clothes off, well, right back here."

She shrugged. Clara squeaked.

So... these were what, her future selves? Versions of her the TARDIS had arranged to all share one big room while they were in the middle of their nude run throughout the TARDIS's history and future?

Clara stared.

"How- how long before I can get dressed?" Clara managed, voice high.

"First time around? Ooh, too long ago, can't remember exactly," the other Clara said. "They all blur together after a while."

"All?!" Clara squealed.

"Yeah, happens a fair bit," the other Clara said. "Relax, it's comfy in here. It's out there you have to worry about getting seen."

"And careful of the crazy dark-haired lady!" another Clara called. "Extra humiliating whenever Missy shows up."

"Bill's not bad though."

"Yeah, Bill's great."

"And don't try to steal clothes off that girl in the leather bikini!"

"Or do, if you're into-"

"Does anyone know what the penguin was all about?!"

Several voices rose into a chorus; Clara yelped, and staggered back out of the room, suddenly hyperaware once more of her own nudity, and apparently how it wasn't going to be over as soon as she'd thought.

Meanwhile, in the room, the Clara that had spoken to her sighed absently and shrugged.

"She'll be back," she said.

"Well duh," dozens upon dozens of voices answered in unison.