The next day, Celia took another look at the journal. She was surprised to find instructions to mail a package special delivery. She found the materials in the TARDIS and set to work, worrying that she'd already lost too much time.
She suddenly remembered everything about the Doctor's plan and their time in captivity together. She had serious doubts about the plan working. A lot depended on things happening that were out of her control. She knew she had to keep Yog away from the TARDIS and to keep him from knowing she knew who he was. It was clear he was trying to find a way to get to the TARDIS without her knowing. Twice she saw him sneaking out of the house. He didn't know where to look for the TARDIS though. She was glad it was parked among the trees on the other side of the park near the campus.
Celia decided to start sleeping there at night, and so that night she sneaked out of the house and went to the TARDIS to keep vigil. Celia heard a noise outside the TARDIS. A car pulled up on the street. A door slammed. Low voices in a conversation that she couldn't quite hear. She gathered herself together, suddenly frightened. The Doctor's message had been to protect the TARDIS, not even about himself.
Celia stood in the moonlight, looking out over the lawn of Miskatonic University toward the direction of the house on Crane Street. She thought she had seen a shadow move across the grass near the trees, and she wondered who might be out there. She thought about Wingate's fear of going out after dark and his admonitions to her to be careful and to avoid certain parts of town. She shook her head, the creepiness of the place was getting to her. The furtive look on the faces of the strangers that she met, the overwhelming sense of fish—not just the smell of fish, but something fish-like about the people.
"But who was out there?" she wondered again, fear gripping her heart.
She crept cautiously out of the TARDIS, keeping close to the side and in the shadows as much as possible. When she returned to the door of TARDIS, no one was in sight. Had she just imagined it? There were so many unsettling things about this place, it would be easy for her imagination to run wild.
She opened the door to the TARDIS and stepped inside. The control panel was dark. A faint glow came from underneath the panel where the heart of the TARDIS lay. She sighed, preparing to curl up and try to sleep on the bench when to her surprise, the door opened.
The Doctor stood in the doorway, and Celia's heart went still.
"At last," he said, looking around him. "I've been waiting for this moment for a long time," he added in a sort of hiss.
"You can't be in here," Celia replied in alarm. "You're not really the Doctor!"
"You're right. There's no need to pretend any longer. My name is Yog. And I am taking control of this ship!" he said confidently.
"Well, you can't have it!" Celia replied more confidently than she felt.
"Who's going to stop me? Yog hissed, taking another step toward the control panel. "You?" he said with a laugh. He grabbed her arm, twisting it painfully behind her back and forced her to the door.
Celia struggled against him, crying out in pain, "You're hurting me!" she tried with her free arm to grab her sonic screwdriver from her pocket, but it was just out of reach.
Yog opened the door to push Celia out, but was met by a stranger in the doorway.
I thought you'd never get here," Celia said to the stranger, taking advantage of Yog's surprise to wriggle out of his grasp, grab her sonic screwdriver from her pocket.
She aimed it at him and pushed a button.
It made a high pitched noise and it seemed to her that Yog appeared different. It was as though she could see Yog as he really was like an image superimposed on a screen. He paused mid-step, but then staggered forward.
"That's not going to stop me," Yog replied with conviction.
The stranger in the doorway had one in his hand, looking at in in surprise. "What?" he asked, "What is going on?"
"Flip the switch!" Celia yelled, and the stranger turned a switch on the sonic screwdriver. The two devices reacted exactly as Celia hoped. The sound the two sonic screwdrivers made was nearly deafening. Yog staggered, holding his head with his hands and then collapsed on the floor.
"Oh, no! I didn't kill him did I?" the stranger asked running over to where the Doctor lay.
"No," Celia replied, having reached him first. "He's just unconscious. But we need to get the Doctor back before Yog wakes up."
"How?" the stranger asked, looking around at the TARIS for the first time. "Wait," he said, stepping out of the door and then walking around the outside before coming back in.
"Derek?" Celia called.
"Wait," the stranger replied. "How'd you know my name?" he asked, poking his head back into the TARDIS.
"We met before. Don't you remember?"
"We were back in time as captives. I remember now!" he asked, cautiously coming inside. "You're Celia? You were just a kid—weren't you? You're not a kid any more!"
Celia blushed, aware of the compliment. She turned back to look at the body of the Doctor, unconscious on the floor of the TARDIS. "I feel like there's something we're supposed to do, but I don't know what," she added in frustration. "I had a journal I'd kept for years—ever since I was fifteen. And in the journal, I found some notes I had never seen before. The pages had been blank! But now, there's notes and pictures. I can't even make sense of it all!"
"Can I see it?" Derek asked, holding out his hand for it.
"Of course! Maybe you can make sense of my note," Celia replied, feeling a bit embarrassed.
Derek flipped through the journal. "Look!" he exclaimed. "You've got it all right here! Instructions on how to bring the Doctor back. But we've got to work quickly! He's going to regain consciousness any moment."
The two hurriedly scanned the notes, but Celia no longer had to read them. She suddenly remembered everything she'd written after her time in captivity. She remembered every moment of that time with the Doctor and Derek as well.
"It's nice to finally really meet you," Celia said shyly, as she assembled the contraption that would bring the Doctor back. It was similar to the machine that the Doctor had used on the professor, but because the professor had been ready to return, that machine needed less power. The one intended to bring the Doctor back was going to have to be bigger and more powerful.
Derek was digging in a bin under the console, looking for a part. "Yes, it is," he replied, smiling at her. She was no longer the 15 year old kid he'd met. She had grown into a beautiful woman.
"How old are you now?" he asked, hoping she wouldn't mind the question.
"Twenty five," she said with a smile. "And you?"
"Twenty-six" he said, glad to be older still.
"I'm glad you got the sonic screwdriver, and even more glad you followed the instructions," Celia said, hooking up part of the machine as she spoke.
"You sent this to me?" Derek asked, looking at the sonic screwdriver in his hand.
"Yes! I followed the plan just like the Doctor said. I made the screwdriver, mailed it to you and hoped you'd follow the directions in the note. If you hadn't, everything would have failed."
"You made this?" Derek asked in surprise.
"Why is that so surprising?" Celia asked defensively. "First the Doctor, now you. Yes, I made it. I copied the instructions from the Doctor's book in the library—both sets. The first one I made was made deliberately wrong so that it would react with the Doctor's when I met him again. It was programmed to go off when it came near the TARDIS. Then, when I saw the new instructions in my notebook, I followed them, and made yours. It was set to enhance the signal from mine to incapacitate Yog.
Derek just shook his head.
"Sorry! I'm just not mechanically inclined," he admitted. "I have to admit when I received it in the mail yesterday with a message to take the train from New York here, and look for a blue police box, I thought it was some sort of prank. I had no idea what it was all about at first, but as soon as I saw you with yours, it all came back to me."
They got the dials working as they talked. Celia tried to explain what life was like in England in the year 2035. "Maybe when we get the Doctor back we can go there and I can show you around London," she suggested, blushing a bit as she spoke.
"That sounds great!" he agreed enthusiastically.
The machine began to whir and spin. The Doctor struggled against the forces as he regained consciousness, and both Derek and Celia had to hold him down. Then, after a few moments, he stopped struggling. Celia and Derek looked at each other in alarm. Celia couldn't even tell if he were still breathing.
"Oh, my god! Is he okay?" she cried, laying her head on his chest to hear his hearts.
As she did so, he opened his eyes and she jumped back in alarm.
"Hello!" he said with a smile, "miss me?"
"Doctor is it you?" Celia asked, still feeling afraid.
"Of course it's me!" he said with a grin, jumping up as though ready for action. "You did it! And just in time, too! I think if Yog had gotten ahold of this machine, we would have been in big trouble.