"Doctor…" Christina started, but the Doctor cut her off. "Go get some sleep, Christina Even nobility needs sleep," he ordered, kindly. Christina, too exhausted to put up a fight, followed the Doctor's directions to the bedroom he had set up for her.

Christina, once in the bedroom, quickly undressed herself, then stepped into the shower. The water was warm—heat generated by the TARDIS. After shampooing, rinsing, and repeating, she stepped out, wrapped a towel around herself, then headed back to her bedroom.

She opened the closet to see various different outfits with labels on them, marked "Rose", "Martha", and "Donna". Whoever Donna was, Christina didn't know.

Christina got her blue flannel pajamas out and dressed quickly. She pulled back the TARDIS-blue covers, and quickly fell asleep.

"Christina, I've got a surprise for you. Wake up!" the Doctor's voice said, knocking on the door. Sleepily, Christina rose out of bed and yelled, "Give me fifteen minutes!" Exhausted, she muttered to herself, "Wish I some coffee, black." To her surprise, a tray with a steaming hot mug of black coffee swiveled out of the wall.

"TARDIS?" she wondered. As soon as she said it, a screen popped out and showed clips from the TARDIS's past, it landing and re-landing, the Doctor stepping out of it in different places with different people, one whom she recognized as Martha. Having a sudden thought, she said, voice shaking, "I-I'd like to see Rose Tyler, um, please." ON the screen showed a blonde girl, tears in her eyes standing across from the Doctor.

"Is that what you do, Doctor? Jus' leave us beyind?" she said, voice unsteady.

"Martha Jones," she said voice more confident. On the screen showed an African-English girl, Martha dressed in the same outfit she had met her in.

"He means the world to me, an' he never looks at me twice. But I don't care. I love him," Martha admitted.

"You go girl!" Christina said, grinning. She remembered the tag from the closet and said, "Donna Noble." On the screen popped a red-head in a wedding dress standing next to tubes of weird-looking liquids of various colors—something you'd see in a mad scientists laboratory.

Donna slapped the Doctor. "What?" he asked, in shock. She scowled at him.

Christina smiled. The Doctor sure had a load of companions. The Needy Blonde, the Eponine from "Les Miserables", and the Fiery Red Head. Christina, remembering her promise to the Doctor, quickly dressed in dark-wash jeans a black DKNY shirt, pulled her hair back, put on her black Converse, and ran into the TARDIS console room.

"Christina, are you ready to see?" the Doctor asked, excitedly. Christina paused, then said, "Doctor, before I open these doors to the magical wonders of the unknown, I'd like to get this off my chest." She took a deep breath and counted to ten. "Okay, here we go… you said I was the only one who you took to New Earth, but I wasn't. You took Rose and Martha there. I met Martha when we visited that old London town, and I read about Rose in your diary. Plus, I saw images of her, Martha, and Donna on the screen the TARDIS popped out. You've had companions, and you lost 'em. All of 'em Doctor. Are you going to do that to me? Lose me as well, then drop me off in the lost and found?" she said. The Doctor's eyes hardened behind his glasses.

He sighed, then said, "Lady Christina de Souza. I was so happy when I met you, yet reluctant. You were all my companions in one. Everyone. Except, I had lost everything that was important to me, and you brought it back. Christina, I need to show you this. One last trip. Just one. I had meant to do this from the beginning, but there wasn't much I could do. Come." He started walking outside the TARDIS doors. Christina ran out the doors as well.

Christina looked at what she saw and was amazed. "T-this, is a planet, then? They're planet?" she gawked. The Doctor nodded. "Every single one of them." The planet was surrounded by framed photos, clips, memories, accessories, and mini-bios of the Doctor's past companions. She turned her head and saw a picture of Rose. Rose definitely looked around her early twenties, but then she looked at another picture, where she looked at least another five years older in skin-tight leather and well, apparently dyed her hair a lighter blonde. She saw a picture of Martha, cocking her head slightly in a cocktail dress. She looked beautiful.

Everywhere she looked she saw a different companion and a bio. She analyzed a pretty lady with a smirk on her face in a white robe. The caption under it read: Romana1, regenerated after we completed the Key Of Time. Smart-alec, Time Lord.

Then, remembering what she was going to say, Christina said, "Doctor. I'm not the only one, and I knew that from the beginning. But, I never expected that'd you'd, well, use me…" her voice trailed off.

The Doctor muttered something under his breath and said, "Lady Christina de Souza. When I met you, you were the ideal, and perfect companion. Well, besides your gift of disobeying orders… but, you were like Rose, in so many ways. Crafty, brilliant. You had Donna's sassiness, and you reminded me of Susan, my g-granddaughter. You were all of them in one. So I wanted to make a tribute to you… I made a vortex manipulator, that would create a planet… all I needed were some minor Earth materials…"

"That's what the trips to the store were for!" Christina exclaimed. The Doctor nodded. "And so I made a planet while you were sleeping, and I wanted to show you all the people you were, so many brilliant people…" he said, voice trailing off. He looked at Christina and then continued.

"Christina… I learned something and did some research… you were born on January 1, the first day of the year… and that means… I'm sorry, Christina… I'm so sorry, but you're not human."

"What?" Christina cried. The Doctor continued. "Christina, you are from an alien race, called the Clicicords. You were put into a pod and set on Earth, to destroy me. Yes, to destroy me." He looked at Christina's expression, and sighed. "Christina Margaret Evangeline de Souza… you were meant to be every one of my companions… the weapon against me… and you were supposed to eventually kill me… but you didn't. Because when you nicked something, that gold cup that was worth millions that I smashed… that was something you were MEANT to steal, and I wasn't MEANT to smash it, because your main purpose was in there… so I smashed my death. You have every personality that my companions have ever had… I'm sorry, Christina. I'm so sorry. But I'm going to have to swipe your mind."

"D-Doctor, no!" Christina screamed. She began running to the TARDIS, but the Doctor grabbed her. "Christina, I'm sorry. I'm so sorry." He put his finger-tips to her temples. "No!" Christina screamed.

"Donna, I was just going," the Doctor said, looking at the red-headed girl. The girl stopped talking. "Yeah. See ya."

"Doctor, you can't do this!" Christina screamed. "You can't!"

"NO, please Doctor no!" Donna said.

"We had the best of times. The best," the Doctor said to Christina.

"Please, no," Donna whispered. "No."

Christina fell to the floor, and the deed was done. The Doctor dragged her into the TARDIS, and sighed. She'd still find him somehow when she woke up, the erasing was only temporary. He had to kill her.