Yaz and Snoring Woman are in a dull tunnel.

With a submarine in it.

Ryan is presenting the results of his bird autopsy.

He doesn't even know what a pathogen is.

The Doctor's gone into Exposition Mode!

We're all full of micro-plastics!

I'm not.

An alien bacterium is eating the plastic in people and causing them to explode.

The Doctor's realised Suki's got an over-equipped lab.

Suki's vanished.

Now birds are attacking them all.

I don't know why.

Except the episode's reached a point where it needs to be exciting.

Except it's not that exciting. They're somehow outrunning the birds.

One of them can barely even move and he's still outrunning the birds.

I've seen milk floats move faster than those birds.

Everyone's in the TARDIS and it's time for the Doctor to give English Astronaut the cure she's created.

The Doctor's with Yaz, "Look at you, going off and exploring and not getting yourself killed."

They're at the bottom of the sea, in a base made of plastic.

Snoring Woman delivers her awe-struck line with all the sense of awe of a woman who's found out her eighteenth favourite show is on TV tonight.

Machinery's beeping on the TARDIS.

The Doctor's confronting Suki.