"Could we be any more trapped?" Donna asked him. "Little bit hot."
"See? The energy converter takes the lava, uses the power to create a fusion matrix, which welds Pyrovile to human. Now it's complete, they can convert millions." He explained to her.
"But can't you change it with these controls?"
"Of course I can, but don't you see? That's why the soothsayers can't see the volcano. There is no volcano. Vesuvius is never going to erupt. The Pyrovile are stealing all its power. They're going to use it to take over the world."
"But you can change it back?"
"I can invert the system, set off the volcano, and blow them up, yes. But, that's the choice, Donna. It's Pompeii or the world."
"Oh, my God."
"If Pompeii is destroyed then it's not just history, it's me. I make it happen."
"Doctor, the Pyrovile are made of rocks. Maybe they can't be blown up."
"Vesuvius explodes with the force of twenty four nuclear bombs. Nothing can survive it. Certainly not us."
He looks at the baby in the pod next to him. He had failed him. He picks Kiam and snuggles him to his chest and kisses his head. Kiam grins up and him trusting him. Tears fill his eyes and roll down his cheeks. He had watched his son struggle to breath and to live but the tiny body had held onto life. Now he had brought him to his death.
"Push this lever and it's over. Twenty thousand people"
Shaking he puts his hand on the stone lever. He feels Donna put her hands over his and he looks at her. Her eyes are filled with tears as well. They press down the lever.
-DW-
He jerks awake, as a small scream erupts from his lips. He quickly bites the back of his hand and looks at the sleeping figures next to him. Donna is laying on her side with spread out next to her. Both are still asleep.
He stands up and goes into his bathroom and splashes water on his face. He turns off the water and stares at himself in the mirror. He sees hatred in his eyes as he looks at himself. He remembers the relief he felt that they had been in an escape pod. But still he had almost killed his own child, what kind of father was he?
He had held Kiam tightly as he ran with Donna back to the Tardis and had gone in as she begged him to save somebody, but the only people he was willing to save was them. She had wanted to save them all and even while rushing to the Tardis, she had tried to send people to safety. While he had yelled at her to leave them.
He goes to the Tardis pool and sits at the bottom and closes his eyes.
"You can't just leave them!" Donna yelled at him.
"Don't you think I've done enough? History's back in place and everyone dies."
"You've got to go back. Doctor, I am telling you, take this thing back. It's not fair."
"No, it's not." He said sadly.
"But your own planet. It burned."
"That's just it. Don't you see, Donna? Can't you understand? If I could go back and save them, then I would. But I can't. I can never go back. I can't. I just can't, I can't."
"Just someone. Please. Not the whole town. Just save someone." She had pleaded so he gave in and saved one family.
His lungs burn and his hearts are pounding in his ears. If he just sits here a little bit longer it will be over. He can no longer endanger her or Kiam.
"It's never forgotten, Caecilius. Oh, time will pass, men'll move on, and stories will fade. But one day, Pompeii will be found again. In thousands of years. And everyone will remember you."
"What about you, Evelina? Can you see anything?"
"The visions have gone."
"The explosion was so powerful it cracked open a rift in time, just for a second. That's what gave you the gift of prophecy. It echoed back into the Pyrovillian alternative. But not any more. You're free."
"But tell me. Who are you, Doctor? With your words, and your temple containing such size within?"
"Oh, I was never here. Don't tell anyone."
"The great god Vulcan must be enraged. It's so volcanic. It's like some sort of volcano. All those people."
Just as blackness is threatening to over take him, he pushes towards the surface of the water. His head pops above it and light flashes in his eyes as he struggles to take a breath. He feels hands grab him roughly and drag him to the side of the pool.
"Oi, Spaceman, What the hell do you think you are doing. Now look at me, my pajamas are soaked. You're buying me new ones." Donna yells at him.
She helps pull him up onto the side of the pool and he lays there staring up at the ceiling.
"Thank you." Donna says.
"Yeah. You were right. Sometimes I need someone. Welcome aboard."