A/N: Sorry it took me a few days to update. Please review!!!!!!

Chapter Four.

The Doctor and Tilly sat in silence, side by side on the control room floor. Neither could think of anything to say. The Doctor was running what she'd said over in his mind. 'Some die sooner than others.' What did that mean? And she was right, why should she confide in him when he hadn't told her anything.

"I'm a Time Lord," the Doctor said suddenly, breaking the silence.

"A what?" asked Tilly in surprise.

"A Time Lord," he repeated. "I told you I wasn't human, I'm a Time Lord."

"What's a Time Lord?"

"A race. A species. Well, they were."

"How do I know you aren't making this up?"

"Come here," the Doctor said, motioning for her to come closer.

"Excuse me?" she asked, raising her eyebrows.

"I'll prove that I'm not human, just come here and give me your hand."

Tilly hesitated for a moment before crawling along the floor to where the Doctor sat and she extended her hand warily. The Doctor took her hand and held it against one side of his chest. Then he took her other hand and placed it on the opposite side of his chest. Tilly gasped and stared at him.

"Oh, that's weird," she said softly, squirming slightly. The Doctor smiled.

"Two hearts," he said. "Told you I wasn't human."

"So, you Time Lords have two hearts?"

"Yup. Well, did. I'm the last one left. No more apart from me."

"Where are the rest?"

"Gone. Dead. Destroyed. All my family, everyone. Along with my home planet."

"How did that happen? Were they murdered?"

"Not intentionally," answered the Doctor sadly. "I didn't think it'd turn out like that."

"What?" Tilly asked in confusion. "You killed your own species and planet?"

"It was in the Time War. I don't like talking about it, so I'll make this brief. Basically, it was the only way to defeat the Daleks, don't even ask about them, and I didn't expect to survive. But I did. Now I'm the only one left."

Tilly didn't say anything. She could see the hurt and pain in the Doctor's deep brown eyes and knew that the memories were hard for him to deal with. She suddenly realised her hands were still on his chest and drew back quickly. The Doctor saw this and couldn't stop a smile from tugging at the corners of his mouth.

"Well, now you've heard about me," he said, once again locking away all the painful memories. Tilly had been right when he first met her; it was emotions that made him feel so very human. "It's time I heard about you."

Tilly looked away, not wanting to tell him anything. But he'd let her into what was obviously a very personal part of his life, the least she could do was return the favour.

"Dad died when I was two in a car accident," Tilly began, avoiding eye contact. "So I hardly remember him. Mum died from an overdose several months later and I was taken to a foster home. I've lived there ever since. It isn't too bad I guess, but they have their own kids so I was always treated a little bit different, not as loved."

"Go on," the Doctor encouraged. Tilly took a deep breath.

"I'd always had a weak heart but I was put on medication to make it better. When I was nine I got diagnosed with Leukaemia. That's a type of cancer."

"Yeah, I know," the Doctor said quietly, surprised and shocked. Human life could be quite cruel.

"Well, I beat it and we all thought I'd be okay. But it came back last year."

Tilly swallowed and stood up. The Doctor noticed she was trembling slightly, and on the verge of tears.

"Well, we'd better get ready for this concert then," she said, putting on a fake smile. She turned and walked quickly to her room.

The Doctor stayed where he was on the floor. His hearts were beating faster than usual. She'll be fine, he reassured himself. Hospitals these days can cure lots of human illnesses, and she said she beat it last time. But he knew deep down that this was a very nasty disease, and second time round... Why wasn't she getting treatment for it?

He sighed sadly and pulled himself to his feet. No point wasting time getting all miserable when he had a concert to get to.

A/N: Review!!!!!!!!! Cookies if you do.