Hermione and the Doctor spent two hours in the warehouse practicing spells before the Sonic's work began to wear off. Hermione felt the rush of energy slowly leave her body as the time went on.
A short time after that, it was Salanya's turn to explain her story.
"After the Medusa Cascade, I looked everywhere for you," she said softly. "It took me a while to realize you'd escaped. The Daleks and the Time Lords kept fighting for a while but for some reason they've been oddly quiet recently. There are no complaints here, of course – it's given us plenty of time to rebuild – but all the same I can't help but wonder what they're up to. And the Sassubits, you say, they're escaping? That just makes me even more worried."
The Doctor's expression showed that he agreed. "We need to get onto the Dalek ship." He said. "If they have anything to do with this, we need to know. He turned to his mother. "No-one can know we're here." He said. "If they find out, I'll be put on trial and we'll never find out what's going on. Is there any way to get to the Dalek ships without being seen?"
Salanya got up and walked over to the back of the room, where Hermione had just noticed a large pile of boxes were stacked against the wall. She opened one and pulled out two armbands. "These are high-frequency perception filters. No-one can even remember that you exist while you're wearing them. They should be powerful enough to get you onto the Dalek ships undetected."
The Doctor turned the devices over in his hands before giving one to Hermione. "These are extremely high quality," he noted. "Where did you come by them?"
"After the Medusa Cascade Rassilon had a new respect, I suppose. He gave me free access to the weapons vaults in the Citadel and I've been keeping some here, just in case."
"Thank you."
"It isn't significant. Now you need to go soon before they register you're in the city." With this final sentence she bundled them out of the door and closed it behind them.
"So that was your mum." Hermione remarked.
"Nice woman," the Doctor said. "Bit bossy, though, I have to say."
Together they slipped the perception filters around their wrists and set off through the city.