When the digital intruder starts impersonating Hannah, she goes to the police. Meanwhile, new anonymous email accounts start contacting her with sexually explicit, abusive content.

stalked@bbc.co.uk

Episodes released Tuesday.

Hosts: Carole Cadwalladr and Hannah Mossman Moore.
Producers: Georgia Catt and Rob Byrne
Original music and vocals by Self Esteem
Original music: Phil Channell
Sound design by Phil Channel, Georgia Catt and Rob Byrne
Actor: Zak Shukor
Series editor: Philip Sellars
Commissioner: Dylan Haskins

Original footage from: Giorgio Armani Tennis Classic/Facebook
Stalked is a BBC Studios Audio production for BBC Sounds and Radio 5live