The Doctor's eyes widened. That face! That face that he thought he would never see again!

She took a few steps forward.

"It's you!" she said. "It's really you!"

"Jenny?" the Doctor whispered.

"Dad!"

In two steps, the Doctor had Jenny in his arms. He held her securely, marveling that she was even there.

"But how…?" he asked, pulling away.

Jenny laughed delightedly.

"I can't believe I found you! I've been searching and searching for you, and here you are!"

"Oh Jenny," the Doctor hugged her again. It was unbelievable that she should be there. "You were dead. I saw you die," he said in her ear.

"I know," Jenny said. "I know I died. But then… I woke up again."

"I should have waited longer," the Doctor scolded himself. "I knew there was the possibility that you would regenerate."

"Regener-what?" Jenny asked.

Before the Doctor could answer, he was interrupted.

"…Doctor?"

The Doctor turned around, his arms still around Jenny. Rose was standing in the doorway of the shop, holding a plastic bag with their chips in one hand, and her purse in the other. Her face was full of confusion. The Doctor realized with a flash that she didn't know who Jenny was, and right now he was in a very compromising situation. He let go of Jenny.

"Rose!" he said, plastering a grin on his face.

"Doctor? What's going on?" Rose asked, taking a step forward.

"Rose, this is Jenny," the Doctor introduced.

"That's nice," Rose said uncertainly. "Now who's Jenny?"

Jenny thrust out her hand and shook Rose's enthusiastically.

"Are you another friend, like Donna?" she asked.

"Actually, I'm his wife," Rose said, a dangerous edge to her voice.

"Jenny, this is Rose. Rose, this is Jenny… my daughter."

Rose's eyebrows shot up, and her eyes grew round with surprise.

"You daughter?" she asked.

The Doctor could see that this whole situation would get away from him fast if he wasn't careful.

"She was… ah…. taken from my DNA. It was the way this race of people procreated. They used my DNA as a template to construct another living being – Jenny."

Rose visibly softened towards Jenny.

"No mum involved?" she asked cautiously.

"No, just Dad," Jenny said.

Rose looked relieved.

"Why am I not surprised?" she quipped. "Well, that's not the strangest thing that happened to us."

"And you were all ready to jump to conclusions," the Doctor chided Rose gently.

Rose pulled a face.

"What was I supposed to think, Mister? I walk out of the shop, and you're hugging another woman, who you then announce is your daughter." She poked the Doctor in the arm.

"Where's Donna?" Jenny asked, looking around expectantly.

The Doctor's face fell a little.

"She's… not here. What I can't figure out," he said, hastily changing the subject, "is how you got here. Don't get me wrong, I'm thrilled that you're here. But… you died. You died in my arms and I couldn't save you."

A lump formed in the Doctor's throat, preventing him from saying any more. Losing all that was left of his family again was an extremely painful memory that he had tried to bury deep within his subconscious. Rose laid a comforting hand on his arm. He took her hand in his and squeezed it gently, glad of her comfort.

"I know, Dad. But that's the thing. I woke up again. They tell me that's unusual."

"That depends on who you talk to," Rose said, with a sly look at the Doctor.

"You regenerated. That's brilliant!" the Doctor said.

"But she looks the same," Rose objected.

The Doctor shot her a questioning look.

"You didn't know who Jenny was until I introduced her," he pointed out.

Rose blushed.

"I… sort of remember her. I remember her from your memories, but there wasn't really a name attached to her. I… remember her better now – "

"Now that you're not jumping to all the wrong conclusions?" the Doctor asked.

"Something like that," Rose said. "I knew in the back of my mind that she was someone you knew, but I guess I let my jealousy take over just a little."

The Doctor gave her a warm smile, as if to reassure her that she need never be jealous.

"That's an interesting question, though," he said, tapping his nose thoughtfully with the end of his finger. "Why didn't you get a new body?"

Jenny frowned.

"I don't understand," she said.

"When I regenerated, my cells made themselves over again," the Doctor explained. "It was still me, but I looked different."

"It's true," Rose cut in. "When I met him, he had big ears and almost no hair."

"So the question is," the Doctor said, ignoring the crack about his ears. "How did you come back to life without your cells remaking themselves? You must have had just enough Time Lord DNA to repair your cells without remaking them. Interesting…"

The Doctor's stomach rumbled loudly.

Rose and Jenny exchanged glances, and started giggling.

"Why don't we call in sick for the rest of the afternoon, and take Jenny home?" the Doctor suggested.

Rose nodded.

"Good idea, I'm starving!"

--

"I've never had these before," Jenny said, picking up a chip and looking at it dubiously.

"Earth specialty," the Doctor replied. "Potatoes fried in grease. You won't find them anywhere else in the galaxy."

Jenny bit into a golden chip hesitantly. Her eyes widened, and she popped the whole chip into her mouth.

"It's really good!" she exclaimed, surprised.

"Yeah," the Doctor said. "Addictively so."

Rose came into the dining room, carrying a pitcher of water and plates.

"Oi! Don't start without me," she complained good-naturedly.

The plates were passed around, and they began to eat.

"It's a bit surreal, actually finding you," Jenny said, sampling some of the cooked vegetables. "After I woke up, I got to thinking about what you had said about us travelling together. It seemed like such a wonderful idea- going to the stars and seeing other places, and meeting other races…"

"She's your daughter alright," Rose said, smirking.

"I made up my mind to find you," Jenny continued. "So I found a ship, and started looking. But you're pretty hard to find. I wasn't having much luck, until I picked up on a strange energy signature. I think it was your ship, because it was on the planet where I was born as well. I followed it here."

"You followed the TARDIS's signal all the way here?" the Doctor asked, surprised.

Jenny shrugged.

"Sure. It was pretty tricky, but I managed to modify my ship so I could follow the signal."

"Did she tear a whole in the void?" Rose asked the Doctor, concern showing on her face.

The Doctor shook his head.

"If there was a tear, we would have felt the effects by now," he said.

"So how did you get across?" Rose said, turning to Jenny.

"I have no idea," Jenny replied. "I'm just so glad I found you, Dad. And you too, Rose."

The Doctor rubbed the back of his neck, a guilty look on his face.

"Weeeeeell, that's the thing, Jenny. You didn't really find me."

Jenny looked puzzled.

"What are you talking about? You're right here."

"What I mean is… that is to say…" the Doctor struggled. "I'm like you- a clone of the real Doctor. I'm a Human/Time Lord metacrisis made when he put his regeneration energy into his spare hand. Donna touched it, and when she did… I was grown."

"You're a clone?" Jenny asked. The Doctor nodded. "You're not the real thing?"

"I'm the real me, but I'm not him."

"So, are you my brother or my father?" Jenny asked.

"Now there's one for Jerry Springer," Rose muttered under her breath.

"I don't understand," Jenny said with a sigh. "You look like my dad, you sound like him, you remember me, but you're not him?"

"Yeah," the Doctor said with a sigh.

"So where's the other you?"

"In the other universe. You crossed universes. Did you know that?"

"No. I didn't think that was possible," Jenny said.

"It's not supposed to be. But maybe your ship was equipped for it."

"Like I said, I don't know," Jenny said. "I'm not really sure how I even know how to pilot it. I just do. Can I stay here?"

Rose smiled.

"You can stay here as long as you want," she said.

But the Doctor shook his head sadly.

"You need to go back," he said. "You need to go back across the void."

"Don't you want me here?" Jenny asked, her eyes suspiciously liquid.

The Doctor put both his hands on her shoulders.

"I would love to have you stay with us, Jenny. You're my daughter. But the other me, he needs you more."

"What do you mean?" Rose asked.

"If I'm right, and I usually am, he's had to leave Donna. He'll be alone."

"Why would he leave Donna?" Rose said. "She seemed to love travelling with him."

"It was a two-way metacrisis. Meaning she got a Time Lord's consciousness. The human brain is not designed to deal with that amount of knowledge. I hope he didn't, but I'm afraid he might have had to wipe her memories."

"Wipe all her memories of travelling with him?" Rose gasped.

"Yeah," he said, sadly. "You have to understand, Rose, it might have been the only way to save her. But Jenny," turning to her, "If I'm right, he's got no one now. And that's not a good place to be in. He needs someone, if only to hold him back, to tell him to stop. You're family. He needs you."

Jenny looked at the Doctor closely, as if to gauge if he was telling the truth or not. Then, she gave a short, jerking nod.

"Ok," she said. "I'll find him, if he needs me."

The Doctor pulled Jenny into his arms and hugged her.

"I'm sorry. I'm so sorry. But I have Rose and he has no one. I can't be that selfish," he said.

Jenny pulled away from him, and wiped a tear away from her cheek.

"Do I have to go right now?" she asked.

"We don't know how long the hole you came through will be open. The sooner the better."

She nodded.

"I'll show you where I hid my ship," she said.

--

"So how did you wind up getting called Jenny?" Rose asked, watching as the Doctor curiously investigated Jenny's ship. "It wasn't the Doctor. You should have heard the things he wanted to call our car."

"Donna named me. I'm a generated anomaly, so Donna suggested 'Jenny'. I like it."

"Me too," Rose said, smiling.

"Well, you've got an interesting ship here, Jenny. Seems it's capable of finding holes in the universes and going through them without any damage. Although, I wouldn't recommend it as a regular pass time." The Doctor said. "I tweaked a few of the systems, and checked things. You should be safe for your flight home."

"Tweaked them with what?" Rose asked.

The Doctor looked shifty, but didn't answer.

"I've also retrofitted it with a tracking device that should help you find the other Doctor relatively easily," he continued.

Jenny looked at the ship, and the flung herself into the Doctor's arms.

"It's not fair," she said. "I just found you, and now I have to do it all over again."

"I know," the Doctor said, stroking her hair, "But he needs your more than I do. He needs someone to keep him sane, and you're just the person."

"I don't want to go," she said.

The Doctor smiled sadly, and hugged her tightly.

"I love you, Jenny," he said softly.

Jenny sniffed.

"I didn't know what love felt like till you loved me, Dad," she replied.

She moved out of his arms, and hugged Rose.

"It was nice to meet you," Rose said.

"Yeah. It was. I'm glad you're here to look after Dad."

Rose smiled knowingly.

"You look after the other one, yeah? And tell him… tell him we're happy here."

"I will," Jenny promised.

She moved to the Doctor again, and kissed his cheek.

"Love you, Dad," she whispered.

Then, she ascended the ladder into her ship.

The Doctor and Rose watched it take off, their arms around each other.

--

"Doctor? There's something I don't understand," Rose said. She was sitting up in bed, comfortably propped up on pillows.

The Doctor looked up from the book he was reading.

"What's that, Rose?" he asked, taking his thick-rimmed specs off.

"If I know all your memories, why couldn't I remember Jenny?"

The Doctor looked thoughtful.

"I suppose it's like you said. You sort of knew her, but it was in the back of your mind. I have a lot of memories that I've shared with you. You can't be expected to recall every single one of them."

"But I didn't know things about her. She had to explain her name to me. Shouldn't I have known that?" Rose asked, her brow furrowing.

"You probably would have, if you would have concentrated on it. You have to let your brain acclimatize to having so much information in it," the Doctor replied.

Rose laughed.

"So it's the fault of my puny, human sized brain?"

"Something like that," the Doctor agreed. He picked up his book again.

"I will say this for you, Doctor," said Rose, pulling his book down so that he was looking at her. "You sure have a weakness for blonds."

"You can say that again!" the Doctor replied, flinging his book aside.

Author's Note: I was surprised at the number of people who were excited for Jenny. I mean, I know I liked her, but I didn't know if she was widely excepted by the fan community. I mean, when the spoiler came out that the Doctor had a daughter, I think all of us Rose/Ten people were a little bit worried. But it turned out for the best. I would really love to see Jenny as a permanent companion for the Doctor in the show. It would make a totally different dynamic if he was travelling with his daughter. And after all, he traveled with his granddaughter, Susan. They can't have let Jenny live for no reason, can they?

Thanks to everyone who recommended a place to find a complete list of companions! I ended up using Wikipedia, the fount of knowledge that it is. I now have the whole list, including the debated ones, and know a lot more about classic companions than I did before. For instance, I now know that the definition of a companion is up for debate. Is Sara Kingdom a companion even though she was only there for two episodes? Would Sally Sparrow be considered one, even though she hardly met the Doctor? Does a companion have to stay on for a relative amount of time to be considered a companion, or is it measured in the importance they have in the plot? Very interesting stuff.

So now I have my list, which I can use for my own evil purposes (mwhahaha).

.