Author's Note: Didn't get around to writing the next few scenes, so I'm back to summary. I wrote most of the scene between Seo and the Moment, so I'll include that.
Enjoy!
The Chancellory guard discover Jenny, who is exploring and trying to learn about Gallifrey and to fit in.
Meanwhile, Seo heads off to the armory.
Seo quickly accesses what she thinks of as the equivalent of a computer terminal, even though there's something different about it. She finds the access codes for their armory and how to change them, so she changes the codes, wipes her trail, and heads off.
Her goal? Well, as far as Seo is concerned, the Moment's been imprisoned unfairly for centuries.
"Therefore," Seo decides, "it's my job to stage a prison-break."
...
Seo is surprised that the first door to the armory opens very easily with her new code. Funny thing is… the doors seem to be opening even before she finishes typing the code.
"Hasn't anyone on this planet ever heard of security?" Seo asks, as she breezes into the armory. "You'd think that if they had an all-powerful super-weapon in here, they'd at least remember to lock the doors!"
When Seo opens her first door to the armory, alarms sound everywhere.
Time Lords panic.
"Why isn't this impossible?!" Romana demands of the head of the Chancellory Guard. "You told me that the locks would automatically detect the DE imprint of whomever was using them, then request confirmation from both the President and the Chancellor, before allowing entry! But here… no checks! No scans! Whoever this is, she's just walking right in."
The Captain of the Chancellory Guard is perplexed.
"My Lady Romana," he says, flustered. "I don't understand it. I programmed the security myself — it should be impossible."
"Unless, of course, someone wanted full access without anyone knowing he had that kind of access," Braxiatel adds, entering the room. "Someone who could bypass all the codes. Someone like…"
"Rassilon," Romana spits out. She says the name like it's a curse. "Without telling anyone, behind our backs, Rassilon's created a master-key. Which has now been stolen. Oh, that's just brilliant!"
She turns to the Chancellory Guard.
"Is that alien in our custody, yet?" Romana demands.
The Chancellory Guard confirm this.
"Then I'd say she has some explaining to do," says Romana, storming off. "Because whatever is going on in our vault, I'd say that alien is in it up to her neck!"
Braxiatel stops her.
"A word, if I may," Braxiatel requests. "My Lady?"
...
Meanwhile, the Time Lords take Jenny into custody. They demand to know what she and her accomplice are doing here. Who they are and what they want with Gallifrey.
...
Seo is pursued by a group of armed Time Lords, but they can't get into the armory, and — according to them — the Matrix has locked them out of accessing the correct codes.
Once again, Romana is perplexed. And so is Braxiatel, this time.
"Not even Rassilon's master-key would be able to scramble the Matrix," Romana says. "How can something like this be happening?!"
...
Seo, meanwhile, enters the vault.
"Hello?" Seo called out, cautiously.
She crept forwards, peering through the empty darkness, trying to see through the folding and expanding dimensional space.
"You're not a Time Lord," said a voice right behind her.
Seo jumped, spun around.
There, she found a little girl with blonde hair and bright eyes. She held a little stuffed bunny in one hand, and her hair was braided into pigtails.
"Who are…?" Seo started, without thinking. Then her brain caught up with her, and she figured it out. "Oh!" Looked the child up and down. "I thought you were supposed to look like Rose Tyler."
The little girl shrugged. "Chiara Sompters," she said. Gestured down at her own body. "Someday, she'll be more important to you than anything else." She stared into Seo's eyes, with a deep and piercing stare. "How did you make it down here?"
"Easily," Seo said.
"Too easily," said the Moment. She crossed her arms. "Only a handful of people have ever broken into this vault. Of those, only one has broken through enough codes and bypassed enough locks to get deep enough to steal me." She gave a half-smile. "That person isn't you."
"Not my fault if someone left all the doors open," Seo said, with a shrug. "Saves me the effort of breaking all those codes and things, myself."
This made the Moment suddenly intrigued. Her whole face lighting up, as she studied Seo.
"I've never thought of that, before," said the Moment.
"What?"
"How a Key," said the Moment, "sees a lock."
Seo frowned. "You know who I am?"
"I can see everything you are… Key, Cyberplanner, exiled divinity," said the Moment. "Your past and your future." She tried to open a swirling portal. "Let me show you your future — the consequences of your actions, and the—"
Seo groaned. Backed away, waving her arms. "Oh, please don't!" she insisted. "Thanks to my tenth incarnation, I've seen more than I ever wanted to!"
The Moment considered this. Then, in a low voice, "You do want to see this. Trust me."
"Tell you what? My future is boring," Seo said. "Show me yours!"
The Moment stumbled backwards. "My future?"
"Haven't you looked?" Seo asked. "Don't you care what happens to you, in the future? You're sentient. Friendly! Don't you think you deserve better than this?"
The Moment remained silent a long time.
Too long.
She had seen into her own future. She'd seen all the possibilities — so many of them endless stretches of eternity spent locked in a cold, sealed vault. Only visited occasionally by Time Lords trying to use her to see or manipulate their own futures. And most of those were Rassilon.
"I'm like you," Seo explained, reaching out to her. "I know how it feels, having everyone be scared of you! Having everyone want you to do something evil, without asking you, first! It's a miserable life." She gave a gentle smile. "I'm here to give you a better one."
The Moment didn't take Seo's hands.
She was sullen and silent.
"Just come with me," Seo urged her. "Escape with me. I'll find a way to allow you to move on your own. Stop you exploding. You can just be a person, like me!"
The Moment met Seo's eyes, evenly. Didn't blink once.
"I destroyed the Time Lords once before," the Moment reminded Seo. "Just because it's now never happened doesn't mean I didn't do it."
Seo waved this away. "Mass genocide, destroying the universe, tearing down the walls of reality so a bunch of demons turn up… we all do it, sometime. No biggee."
"If I escaped," the Moment continued, "I could threaten something you care about. Like… the Earth. Or Jenny."
Seo froze.
"After all," said the Moment. "You didn't come to Gallifrey to rescue me. Not really. You came because she wanted to. And you wanted to do something for her."
Seo hesitated a second too long.
"I'm also here to help you!" Seo insisted.
The Moment shook her head, her image rippling a little. "You came all this way. Risked everything. Nearly destroyed yourself. And all just to give your sister the chance to find her own people. The people that won't accept her."
"They will!" Seo insisted.
The Moment created a portal in the air, which solidified and showed Jenny, locked up and interrogated by Time Lords.
They called her 'alien'.
"She was not born on Gallifrey," the Moment replied. Giving a shrug, as she paced, again, in front of Seo. "Born a soldier, yes — as were many others here — but for the wrong war. Her upbringing was unconventional. Her attitude more akin to a renegade than anyone they'd embrace. Why should they ever accept her?"
Seo didn't know the answer to this question.
The Moment had expected that.
"The Time Lords will never allow me to leave this place," the Moment said, sadly, but not unkindly. "They're terrified of me. If you let me out… your sister will pay the price."
Seo's hearts sunk.
"And you'd never do that," the Moment whispered.
Seo shook her head. "There has to be some way to get you out of here!" she said. "Some way to get the Time Lords to like Jenny! There just… has to!"
"There's no way out for me," said the Moment. Then, with a sly smile, added, "But I can see a way for your sister to be accepted, here."
Seo asks the Moment what it is, and the Moment shows Seo a secret back entrance to the armory and tells her to, "Go to the lower vaults."
Seo is about to leave and go rescue her sister, but the Moment stops her.
Asks Seo if this is really what she wants, and if she's willing to pay the price to get it.
"Whatever the price," says Seo, "for Jenny… I'll pay it."
She heads off.
"And I'll be back to rescue you, too!" Seo insists. "Just you wait and see!"
As Seo runs off, the Moment warns her that "if you rescue me, you'll have to sacrifice someone you love."
It's not clear that Seo hears her.