London is a busy city, most days.
People rush about, from work to lunch to shops to home.
There's always something to occupy one's time.
"This isn't actually dealing with the problem. If you looked at the material with more sophisticated technology than this century has, you'd see that all it's done is disrupt the connection between the Nestene and this mannequin. The chemical we need is for this Nestene itself. Or themselves, hard to get a straight answer."
She walks briskly.
Thea follows. "Nestene being – an alien that can control plastic? And wants to take over Earth, uh, why?"
"The Nestene Consciousness, sort of a hive mind. It's debatable if the main Nestene bit here is even distinct from the other Nestene in the universe, or if they're all one intelligence. Lately, they've been going after inhabited planets more and more, as a source of plastic. They want more bodies."
They arrive outside a random person's flat.
"And they can't just peaceably trade?" asks Thea. "No, of course not. Anyway, what are we getting, do I need to help you identify stuff?"
"No, I just need to decide if we're asking and dealing with the "aliens, oh no!" or if we're stealing."
"There might be a house that's not got people in, could just steal, yeah."
"I can't actually scan for whether a flat has people inside. Want to run around knocking on doors?"
So she goes and knocks on a few doors!
Most of these random strangers are not pleased with being interrupted.
She gets through four before the lady with the sonic screwdriver rejoins her.
"I found it, let's go."
"– Uh, thanks for your time," she says to the person whose door she is currently at, and then off they can go.
Lock, meet lockpick.
She gets them into the flat, and checks the rooms for anything useful.
Thea follows uselessly seeing as how she has no idea what Clara is looking for!
"… So time travel."
The time-traveling madwoman is prodding everything with her stick instead of reading labels, because it's much faster than reading.
"Time travel! I do a lot of it, flitting about the centuries, looking for things to do and places to see."
"With your time machine. That sometimes puts you where you want to go."
"It mostly does, I learned how to pilot from the best. It's just meant for six pilots."
"… And has the safety measure that instead of crashing horribly somewhere it just, what, sometimes divines somehow where you want to go?"
"Oh, that. It's sort of telepathic, she listens to me, but has her own idea of what makes a good vacation."
The strange woman leads Thea towards the street, where she begins weaving her way through traffic, on foot.
"– What was your name again?" Pause. "Also, why did you ask about Cardiff and rocks?"
"Call me Clara. As for Cardiff, there's a sort of...hole in reality there. A rift in space and time. Odd things are known to come out of Cardiff."
Most of the drivers start honking at the obnoxious woman crossing the road.
Obnoxious women. Thea is following as Clara weaves but being slightly more careful and letting Clara nearly get hit but not actually be hit before she follows.
"… So since time travel, do I need to be worried about other things. Like how much do the laws of physics hold with weird aliens, I'd expect 'totally but you have a few minor things wrong' – but clarification would be appreciated."
"There are plenty of weird aliens. What decade is this? You probably have some...Zygons? Silurians? Draconian, Daleks, Raxiacoricofallapatorians...the moon is going to turn out to be an egg, watch out for that."
Pause. "What exactly – or even less exactly – is the moon an egg of, and will it try to kill us all and can we stop it somehow? Like, tides, tides are kinda important, moon is an egg, uh?"
"I actually already took care of the hatching bit for the 21st century-might come around again, though. And it doesn't seem to stop it from being the moon, except for a couple of minutes."
Looks like they're taking the tube.