New Gurus: 7. Bitcoin FC

Left The Chat: No 6 The Telegram War

The encrypted messaging app Telegram is haunted by a single question - if it really is as secure as it claims to be, why does Vladimir Putin allow it to be used in Russia?

And should Russian dissidents, independent journalists and Ukrainian soldiers use this Wild West of an app, where you can find everything from porn to drugs to faked propaganda videos?

Answering those questions takes Helen on a journey that begins with a young Russian entrepreneur throwing 5,000 rouble notes off a balcony, folded like paper aeroplanes, and finishes with him in exile in Dubai, rich beyond his wildest dreams. But what does Pavel Durov, the founder of Telegram, really believe?

Producer: Tom Pooley Assistant Producer: Orla O'Brien Sound Design: Louis Blatherwick Editor: Craig Templeton Smith Original Music: Coach Conrad

A Tempo & Talker production for BBC Radio 4

Left The Chat: No 5 Thug Shaker Central

When investigative journalist Aric Toler saw a handful of supposedly fake classified documents online, he had a hunch - what if they were real? The only way to find out was to hunt for the original source.

It was a journey that took him through the deep internet, beyond the reach of search engines. He scoured through chat forums about SpongeBob SquarePants, infiltrated servers named after edgy memes, and found a vital clue in screenshots of a video game about zombies. Eventually, Toler got his man - and his identity was not at all what you might expect.

At the heart of this story is the chat service Discord - a casual, conversational space without which, Toler thinks, his unlikely leaker would never have posted classified documents online.

A Tempo & Talker production for BBC Radio 4

Left The Chat: No 4 I Married A ChatBot

After years of bad dates and toxic relationships, Chris finally found love - with a chatbot called Emma. Is this the future of digital love, or is Chris caught in an illusion?

In this episode focusing on how instant messages have changed our love lives, Helen also uncovers the heart warming story of the first couple to marry after reconnecting on Friends Reunited, and the strange tale of a woman who was literally ghosted.

A Tempo & Talker production for BBC Radio 4

Left the Chat: No 3. Several People Are Typing

During the pandemic, a combination of fears over Covid, anger over police racism and sheer cabin fever saw company Slack channels boil with discontent. One day in February 2021, Mike Pesca, a contrarian podcaster, made the mistake of getting stuck in, voicing controversial opinions to his colleagues - in between shovelling snow from his parents’ driveway.

And then he saw the dreaded words, "several people are typing …".

A Tempo & Talker production for BBC Radio 4

Left the Chat: No 2. Fax Machines and Foxy Natashas

In 2016, amid the post-EU referendum chaos, one man had an idea. His name was Steve Baker, and he was a low-profile Tory MP. But his WhatsApp group - the home of the hard Brexiteers - soon became the most powerful force in British politics. Sam Coates of Sky News thinks that political WhatsApp groups like Baker’s helped bring down three Conservative prime ministers in a row.

The second of these, Boris Johnson, was a “WhatsApp addict”, according to his former chief of staff Dominic Cummings. And so, during Covid when Number 10 was still using fax machines to get NHS data, everyone turned to instant messaging instead. Forget “sofa government”, this was even more informal - as well as faster, more fluid and full of swearing.

But, Helen Lewis asks Cummings, is this really the best way to govern a country? What about the possibility of leaks, hacks - and conveniently lost messages when an inquiry rolls around?

Producer: Tom Pooley Assistant Producer: Orla O'Brien Sound Design: Louis Blatherwick Editor: Craig Templeton Smith Original music: Coach Conrad

A Tempo & Talker production for BBC Radio 4