Barbara's been expecting the knock ever since she saw the transmissions. She's spent the time tracing routes on a paper copy of the city map, to the locations she was able to pinpoint. Not nearly enough, and none of them led to the bastard brutalising children.

It's something of a relief, really, when she hears the knock, even as she tenses at the sound. She carefully manoeuvres round the coffee table and towards the door, opening it for Steph.

"I know," is the first thing she says, before backing up to let her in.