The Doctor peered out of the door, mapping out their inconvenient circumstances. He could see in the hallway, at least four Daleks, and, seeing the reflection on the wall, could calculate three others standing guard around the TARDIS. He sighed, and stepped away from the door.

"Doctor, what is it?" asked Tyler, eager to get going. After all, she had a message to deliver.

Instead of answering, the Doctor took out his sonic screwdriver, and began to frantically fiddle with the gun. He was taking it apart, and periodically scanning it.

"Doctor!" shouted Tyler, when he wouldn't answer, "What are you doing? We need to hurry."

"Hey, don't yell." He said, almost too calmly. "I'm trying to turn this gun into something… usable." He gave his little contraption a little twist, and then slipped the sonic screwdriver into the end of it. It looked like a whole new contraption, no longer a gun, but a sort of modified ray, like something out of a lame Saturday night sci-fi show.

"What does that do, then?" Tyler asked. "Does it kill Daleks?"

"No, not kill, stall. It stalls the mechanical Dalek devices, leaving the living thing perfectly safe. It's just immobile."

"For how long?"

"Long enough to get to the TARDIS." He walked over to the door, and peered out into the hallway. He looked back. "Ready?"

Tyler hurried up to stand next to him by the door. "You bet."

The Doctor took a deep breath, then jumped out of the door, and shouted, "Geronimo!" A low sonic wave emanated from the Doctor's hand. Instantly, the Daleks in the surrounding area let out high pitched screams, flashed in sparks and electricity, shuddered, and stopped moving.

"Let's go!" called the Doctor, as he sprinted down the hallway. Tyler looked around her. The Daleks were already recovering, moving side to side, not quite recuperated, but waking up. The sonic blast was strong enough to freeze the Daleks completely, but not for long, just as the Doctor said.

Tyler sprinted after the Doctor, who was waiting for her by the TARDIS door, fumbling with the key. However, no matter how he tried, the door wouldn't budge. He removed the key, and inspected it, trying to see why it won't work.

However, Tyler and the Doctor were running out of time. The Daleks were recovering fast, their lights coming back to life, their motion stabilizing. But the Doctor and Tyler were still vulnerable, in danger.

In exasperation, Tyler cried, "Just snap it open!"

"Oh…" said the Doctor, sheepishly. "I forgot about that…" He snapped his fingers, the doors flew open, and they both rushed inside.

But inside the TARDIS, it was still dark and dim. The TARDIS hadn't fully recovered. Tyler raced to the console, but stood till and silent.

"What are you waiting for, Tyler," asked the Doctor, genuinely concerned.

"It's just…" Tyler trembled. "What if the TARDIS can't hear me? What if it's too broken to respond?"

The Doctor walked slowly to it. "Even then, you can try. Something is wrong. What is it, Tyler?"

Tyler inhaled to steady herself, and replied shakily, "When I was in the junk room, I got a message from the other Doctor and a girl called Rose. They told me to tell the TARDIS those two words, and I promised them that I would." Tearfully, Tyler continued. "But then they said I was going to die. It's going to kill me! I don't want to die, Doctor."

The Doctor looked at Tyler in wonder and shock. There was something about her that didn't quite make sense. The biggest abnormality was her name.

"Oh, Tyler…" said the Doctor. "Tyler Donna Jones."

"Yeah?"

"You are an impossible person, Tyler."

"How do you mean?"

"I landed in your basement," the Doctor explained. "The Daleks didn't do that. I didn't do that. Something forced the TARDIS to come right to you. And then there's your name."

"What's the big deal about my name!" she cried.

"It was designed for me. It was as if your name, your person, your whole being was designed perfectly to draw me here."

Tyler gulped for breath to stifle a sob. "What? Where does that leave us? What does that mean?"

"Tyler Donna Jones. It means that you need to say the words."

"But… I'll die."

The Doctor sighed, in sadness, guilt, and regret. "I know. But you have to do this."

Tyler looked at the Doctor for a long moment. It could have been years, her just standing there wondering what to do. Or it could have been a split second. But, after a time, Tyler nodded. She waked to face the TARDIS.

After another hesitation, Tyler called out, in a voice more powerful than she felt, "Bad Wolf."

Instantly, the TARDIS sprung to life. The lights burst back on, brighter than ever, the console whirred and pulsed, not exactly traveling anywhere, but alive once more. And, not only that, but a whole side to the console began to move. A panel lifted up, and, out of the depths of the inside of the TARDIS, a brilliant white light shone out.

"Impossible…" the Doctor muttered. He remembered the last time the TARDIS had opened up like that. And he realized what was happening.

The light from inside the TARDIS wasn't just a light, it was the TARDIS itself, the whole of time and space. It shone out brilliantly, shining into Tyler's eyes. The light went into her, and filled her mind with the secrets of the universe.

But that wasn't it. The TARDIS had another thing to do, instructed with the two-word code. In the universe, a small rip was made. And, in that rip, Tyler could feel something coming through. But it needed somewhere to go, so Tyler emptied her mind, and allowed someone to come into her mind.

Tyler turned around to face the Doctor, her eyes blinded and unseeing. She called out, "Doctor? Is that you?"

The Doctor nearly fell over where he was. He knew that voice. It wasn't the voice of Tyler Donna Jones, as he expected, but the voice of Rose Tyler.