The TARDIS officially changes ownership

"Skaro?" asked present Clara. "What am I doing on Skaro?"

A naked present Rose Tyler just shrugged while the mysterious figure known as the Ghost of Christmas Yet to Come said nothing.

"Okay," said present Clara to the spirit. "You know the drill. Show me the next scene."

The next scene took place in future Clara's TARDIS all right, but it now looked like a different TARDIS. All the paintings and pictures of naked Rose had been taken down and replaced by a group of paintings that depicted a younger version of the lady in red and her family. Apparently the woman had two younger sisters, one blonde and one dark. Her mother -- or the figure that appeared to be her mother -- looked like an older version of the lady in red as well.

In the corner was a device that appeared to be an old-fashioned CD jukebox.

The mysterious lady in red was still at her desk -- ahem, future Clara's desk -- and tapping away on her -- ahem, future Clara's -- magic typewriter.

Then she stopped and called for Rose.

Future Rose appeared and present Clara noticed that though she was still naked, future Rose now wore a black leather dog collar around her neck. Moreover, the collar had a little silver bell attached to it that rang every time future Rose moved.

"Yes, Princess," said future Rose.

"Call me Mistress," said the lady in red.

"But Clara is my Mistress," said future Rose.

Despite herself, present Clara smiled when she heard this.

"No, Clara used to be your Mistress," said the lady in red. "But she's not here now. So who's your Mistress?"

"Clara," said future Rose Tyler.

"Okay then," said the lady in red. "Then who feeds you and takes care of you?"

"Marcie does," said future Rose.

"And who tells Marcie to do all that?" asked the lady in red.

"You do, Princess," said future Rose.

"Call me Mistress," said the lady in red.

"But Clara is my Mistress," said future Rose.

"But suppose Clara does not come back," said the lady in red. "Then who will be your Mistress?"

"I don't know, " said future Rose. "Then again Clara always comes back."

"She does, does she?" asked the lady in red with an enigmatic expression on her face. "Very well. Take this coin from my hand and put it in the electric minstrel."

"Electric minstrel?" asked future Rose. "Oh. You mean the jukebox? Okay. What song do you want to hear?"

"B-17," said the lady in red.

"But you always play B-17," said future Rose.

"Don't quibble, Rose," said the lady in red. "I gave you an order."

"Okay," said future Rose. "Your wish is my command."

Future Rose walked over to the CD jukebox and did as the lady in red asked. A few minutes later, a familiar song began to play.

"Now sing," said the lady in red.

"Okay," said future Rose. "You don't own me... I'm not just one of your many toys..."

At this point, the lady in red smiled but this time she showed her teeth. And her two canine teeth seemed especially prominent. Almost as if they were -- Wait, thought present Clara. Are those fangs?

"I normally don't like this type of song, Rose," said the lady in red, "but the way you sing it makes it seem so special. In fact, I could listen to you sing it forever if I really wanted to."

"Er, thanks," said future Rose. "You want me to keep on singing?"

"Of course, my dear Rose," said the lady in red. "Of course."

Future Rose continued singing. "And don't tell me what to do..."