In a leafy suburban town in England, we find traces of Kin. Here, people know him as David. And the descriptions we hear of David bear few similarities to the Kin Hannah remembers.

[email protected]

Hosts: Carole Cadwalladr and Hannah Mossman Moore. Producers: Rob Byrne and Georgia Catt Additional research by Katy Ling and Jack Tsang. Original music and vocals by Self Esteem Original music: Phil Channell Sound design by Phil Channel, Rob Byrne and Georgia Catt Actors: Zak Shukor, Enrico Gaoni Production Co-ordinator: Shan Series editor: Philip Sellars Commissioner: Dylan Haskins

In her search for answers, Hannah turns her attention to some of the strangest messages she received.

Hannah speaks to the parents of another young woman who has been stalked, with tragic consequences.

There are a lot of questions Hannah still has. She revisits some of her contacts and connections in the hope of getting answers.

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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, Rob Byrne and Georgia Catt Production Co-ordinator: Shan 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

Kin was supposed to be a successful fashion buyer; a man who jetted between the runways of Milan and Paris to his apartments in London and Hong Kong. Someone who seemed so at home in this world, no one would ever question how he got in.

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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, Rob Byrne and Georgia Catt Production Co-ordinator: Shan Actor: Zak Shukor Series editor: Philip Sellars Commissioner: Dylan Haskins

Stalked is a BBC Studios Audio production for BBC Sounds and Radio 5live

Hannah felt like she was being watched for years, but never understood how. As she begins to unpick her stalker’s techniques, she hears something she wasn’t expecting.

[email protected]

Hosts: Carole Cadwalladr and Hannah Mossman Moore. Producers: Georgia Catt and Rob Byrne Original music and vocals by Rebecca Lucy Taylor aka Self Esteem Original music: Phil Channell Sound design by Phil Channel, Georgia Catt and Rob Byrne. Series editor: Philip Sellars Commissioner: Dylan Haskins Stalked is a BBC Studios Audio production for BBC Sounds and Radio 5live

Hannah's digital intruder has left a trail of data in the menacing messages, that could be clues to their identity. It's time to call in the experts.

[email protected]

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

Linguistic Analysis: Robert Leonard, Marlon Hurt, Juliane Ford, Dakota Wing, Rachel S Audrey T, Zara R, Amanda I.

Original footage from: BurchDurch / YouTube Stalked is a BBC Studios Audio production for BBC Sounds and Radio 5live

Episodes released every Tuesday

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.

[email protected]

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

A once-in-a-lifetime trip to Miami with a charming friend turns into a nightmare for Hannah. Back in London, weird things start happening. Someone claims to be taking control of her online reputation.

[email protected]

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, Rob Byrne and Georgia Catt Actor: Zak Shukor Series editor: Philip Sellars Commissioner: Dylan Haskins Stalked is a BBC Studios Audio production for BBC Sounds and Radio 5live

Episodes released weekly

At 25, an anonymous digital intruder is ruining Hannah’s life. To start to make sense of it all, she goes back to London Fashion Week. And a selfie.

Episodes released weekly.

Contact: [email protected]

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. Original footage from:BBC, Channel 4, NBC, Sky News, Fox News, CNN, MSNBC Series editor: Philip Sellars Commissioner: Dylan Haskins Stalked is a BBC Studios Audio production for BBC Sounds and Radio 5live

There’s an anonymous digital intruder in Hannah’s life. She’s being watched. Threatened. Impersonated. The police can’t help Hannah, so her “ex-step mum,” investigative journalist Carole Cadwalladr, is going to try.

Archive Credit: MSNBC.