Smart sensors can improve citizens' lives, especially when residents are put in charge of gathering the data.

Jane Wakefield reports from the Placa del Sol in Barcelona, where Guillem Camprodon of the city's Fab Lab explains how his initiative of placing noise detectors around the square helped residents finally get the city council to take the problem of night-time disturbances seriously.

Michael Donaldson, the city's commissioner for digital innovation argues that public authorities ought to be able to collect more user data, in the same way that online businesses do, in order to improve public services. But tech consultant Charles Reed Anderson warns that the hype around the potential for smart cities far exceeds what is currently achievable, while Sandra Baer of Personal Cities argues that humans need to remain at the centre of such efforts.

(Picture: Noise level sensor in Barcelona; Credit: BBC)

A group of artists look at how our modern hyper-connected always-on lifestyles are affecting our behaviour and interfering with our sleep.

Their work has been brought together in an exhibition at London's Somerset House, called 24/7: A Wake-Up Call for our Non-Stop World. Manuela Saragosa takes a tour with director and co-curator Jonathan Reekie.

Plus the Canadian artist and author Douglas Coupland tells Manuela how he religiously guards his sleep hours in the name of creativity, and how he remembers the moment he realised his brain was being rewired by the internet back in the 1990s.

Producer: Laurence Knight

(Picture: Sprites I by Alan Warburton, showing at Somerset House; Credit: Alan Warburton via Somerset House)

What happens to your online presence when you die, and who owns your data? Manuela Saragosa speaks to Carl Ohman, a researcher in the digital afterlife from the Oxford Internet Institute, and Dr Elaine Kasket, a counselling psychologist and author of All The Ghosts In The Machine: Illusions of Immortality in the Digital Age.

(Picture: Cloud in the form of a mouse cursor arrow; Credit: cinek20/Getty Images)

Tax evasion is rife in many parts of the world, but might that be partly because we are we taxing the wrong things?

Ed Butler looks at two countries overwhelmed by the problem. Bolivia has the proportionately largest tax-avoiding black economy in the world (at least of countries that gather statistics on these things). Katy Watson reports from a hilltop flea market where paying tax is simply considered bad for business.

Meanwhile Greek economist Nicholas Economides discusses his country's clampdown on the 30% of the economy that operates below the tax radar by encouraging a shift away from cash towards electronic payments that can be more easily monitored.

But are all these efforts being directed at the wrong targets? Most of the tax burden falls on labour in the form of income tax, but comedian and author Dominic Frisby says wealth, land and capital are let off far too lightly.

(Picture: Bolivian woman carrying her baby; Credit: hadynyah/Getty Images)

Gender bias in data collection. Manuela Saragosa speaks to Caroline Criado Perez, author of Invisible Women: Data Bias in a World Designed for Men, winner of the Financial Times business book of the year. Why are there no female crash test dummies? We ask Lotta Jakobsson from the Volvo Cars Safety Centre in Gottenburg in Sweden. And The BBC's Stephanie Hegarty on efforts to steps to make the city of Barcelona more women-friendly.

(Photo: Crash test dummy heads on display, Credit: Getty Images)

Three experts on the next steps for Boris Johnson, Britain and the EU, after a big win for the sitting British prime minister in national elections. Ed Butler speaks to Jill Rutter from the research group UK in a Changing Europe, Sir Andrew Cahn, former head of UK Trade & Investment - a UK government department, and Rebecca Christie, visiting fellow at the Bruegel Institute in Brussels. (Photo: Boris Johnson after his election victory, Credit: Getty Images)

Why do so many people think they know best? And are they putting dolts in charge of government?

Ed Butler speaks to Professor Tom Nichols of the US Naval War College, himself an expert on national security, who wrote a book about why everyone from surgeons to electricians to academics find themselves under attack from novices and ignoramuses who think their opinions should have equal weight.

We also hear from Michael Lewis, whose new book The Fifth Risk examines the extent to which President Trump has neglected the US civil service. Is there a risk of something going catastrophically wrong - for example a nuclear waste containment or a natural disaster response - through the sheer inattention and incompetence of the people put in charge? Plus, might the root of the problem be the Dunning-Kruger Effect - a psychological trait whereby the inept are unaware of their own ineptness? We ask Professor David Dunning from the University of Michigan.

Producer: Laurence Knight

Repeat. First broadcast on 13 November 2018.

(Picture: Two-year-old girl plays with carpentry tools; Credit: lisegagne/Getty Images)

Should we protect historic neighbourhoods from redevelopment when new homes are desperately needed?

Manuela Saragosa looks at two cities at opposite ends of the spectrum. Historian Qin Shao tells of the destruction of her home city of Shanghai over the last 30 years, as entire districts have been demolished to make way for sparkling new high rise buildings. Meanwhile Laura Foote of the campaigning group Yimby Action explains why young residents of San Francisco like her are demanding the construction of many more affordable homes.

So is it possible to strike a balance between the need to conserve and the need to build? Manuela visits one London building recently saved from the developers - the Smithfield market in London's financial district - and asks Chris Costelloe of the Victorian Society where he would draw the line.

Producer: Laurence Knight

(Photo: An old residential building being demolished to make room for skyscrapers in Shanghai; Credit: Johannes Eisele/AFP/Getty Images)

Facial recognition tech is spreading everywhere, but it can still be fooled with a bit of face paint. So should we be worried?

Ed Butler speaks to Professor Alan Woodward, professor of computer science at the University of Surrey, and James Stickland, chief executive of facial recognition tech developer Veridium.

Meanwhile the BBC's China media analyst Kerry Allen tells the grim story of a man who tried to use a dead girl's face to get a bank loan. Plus Ed's face is transformed into a Mondrian painting by anti-surveillance activists The Dazzle Club.

(Picture: Ed Butler's face covered in anti-surveillance paint; Credit: Ed Butler)

How online shopping is fuelling insecure work for delivery drivers. British film director Ken Loach talks about his new film Sorry We Missed You, looking at the impact of insecure work on family life. The BBC's Edwin Lane rides along with a gig economy worker delivering Amazon parcels. And analyst Andrew Lipsman from eMarketer explains how Amazon Prime is driving demand for faster delivery times.

(Photo: Amazon-branded delivery vans seen in May 2019, Credit: Getty Images)

Is Britain's health service really up for sale? Ahead of a general election in the UK, Ed Butler looks at why the NHS probably gets a good deal on drug prices compared with other countries, and why US drug companies might want the health service on the table in any post-Brexit trade deal between the US and the UK. We hear from the BBC's health editor Hugh Pym, US pharmaceutical industry analyst Nielsen Hobbs and Professor Allyson Pollock, director of the Institute of Health and Society at Newcastle University.

(Photo: Protestors show support for the NHS at a protest in London, Credit: Getty Images)

The BBC's Kizzy Cox in New York tries out the developers at tech firm Waverly Labs say can translate between any of 20 spoken languages in just a couple of seconds. Harvard Business School professor Tsedal Neeley describes what happened when one Chilean company switched from Spanish to English overnight. And Melanie Butler, editor of the English Language Gazette, explains why there's a global shortage of English teachers.

Producer: Laurence Knight

(Photo: Hello in different languages, Credit: Getty Images)