Cathy and Peter are now speaking with their dads. But are the new relationships all they hoped for?

Lawyer James Netto has a “day in court like no other” when a father makes a shock appearance.

And we travel to a barracks in the South of England to ask pressing questions of the British Army.

Please note, the image being used is for illustrative purposes only and the child depicted is a model.

World of Secrets will be back soon with gripping new investigations.

Presenter: Ivana Davidovic

Lawyer James has an extraordinary breakthrough for teenage orphan Yvonne. Could her father be alive?

Meanwhile, it’s time for the big day in court. Can the legal team convince the judge to confirm Cathy and Peter’s fathers?

Searching for Soldier Dad is a BBC Long Form Audio production for the BBC World Service.

Please note, the image being used is for illustrative purposes only and the child depicted is a model.

Presenter: Ivana Davidovic

Cathy and Peter confront their demons. Their searches for their fathers take them to dark and desperate places.

And back in London, it’s time to reveal the results of the DNA analysis, with life-changing consequences.

This episode contains references to suicide and self-harm, which some listeners may find upsetting.

If you are suffering distress or despair and need support, you could speak to a health professional, or an organisation that offers support. Details of help available in many countries can be found at Befrienders Worldwide. www.befrienders.org

Searching for Soldier Dad is a BBC Long Form Audio production for the BBC World Service.

Please note, the image being used is for illustrative purposes only and the child depicted is a model.

Presenter: Ivana Davidovic

How did the hunt for an American serial killer inspire DNA detectives in Kenya?

Growing up, Kenyan lawyer Kelvin Kubai admired the British soldiers stationed in Nanyuki. Now, he is on a mission to hold them accountable.

Orphan Yvonne was told her dad died when she was a baby. She hopes to find relatives in the UK. But could she get much more?

Searching for Soldier Dad is a BBC Long Form Audio production for the BBC World Service.

Please note, the image being used is for illustrative purposes only and the child depicted is a model.

Presenter: Ivana Davidovic

Why don’t I have a father? Cathy is 10 years old when she starts asking questions. The secret her mum Maggie is forced to reveal changes everything.

Years later, when lawyers and a geneticist turn up in their hometown in Kenya to take DNA samples, Maggie hopes they can help her finally learn the truth.

Searching for Soldier Dad is a BBC Long Form Audio production for the BBC World Service.

Please note, the image being used is for illustrative purposes only and the child depicted is a model.

Presenter: Ivana Davidovic

DNA detectives track down the British soldiers who fathered children in Kenya then disappeared, leaving the children and their mothers without support.

Episodes released from 20th April.

Searching for Soldier Dad is a BBC Long Form Audio production for the BBC World Service.

Please note, the image being used is for illustrative purposes only and the child depicted is a model.

The time has come to arrest Alisa’s brother, Staton Grubert. Thirty armed agents commando crawl up a dirt track to his trailer in Texas. Staton has no idea that his time is up. Will Alisa finally get closure?

And in a state in the South West, Greg is reunited with Lucy, the girl who had been abused for six years.

This podcast includes some upsetting scenes and discussions of child sexual abuse.

For further information on the issues raised in the programme, contact support organisations in your own country. For a list of organisations in the UK that can provide support go to bbc.co.uk/actionline.

Reporter and Presenter: Sam Piranty

The Darkest Web is a BBC Eye production for the BBC World Service.

Pete and Greg have learnt about a paedophile calling himself “Twinkle”, who runs a website dedicated to sharing images of very young children.

For further information on the issues raised in the programme, contact support organisations in your own country. For a list of organisations in the UK that can provide support go to bbc.co.uk/actionline.

Reporter and Presenter: Sam Piranty

The Darkest Web is a BBC Eye production for the BBC World Service.

After they rescue Lucy, Greg and Pete discover the dark web community is even bigger than they thought. There are hundreds of websites each sharing different images of different kinds of child sexual abuse. Overwhelmed by what they have found online and the sheer scale of the problem, Greg makes a decision to go undercover. He will go online on the dark web and talk to the paedophiles directly. They have to do everything they can to try to stop the abusers.

This podcast includes some upsetting scenes and discussions of child sexual abuse.

For further information on the issues raised in the programme, contact support organisations in your own country. For a list of organisations in the UK that can provide support go to bbc.co.uk/actionline.

Reporter and Presenter: Sam Piranty

US Special Agents Greg and Pete are desperate. Somewhere in America a twelve year old girl, who they have called Lucy, is being sexually abused. Her abuser has been sharing images of his abuse for six years on the dark web. They have to find her - and save her.

They were convinced that Facebook would be able to help them using its facial recognition technology, but the tech giant is unable to help. So they go back to the start, examining every single thing they can see in the room she is being abused in: the sofa, the bed and then finally they wonder what they might discover if they look at the room itself, specifically the exposed brick wall. Is there any way someone could identify these bricks? And could that person help them to find Lucy?

Season 11 of World of Secrets, The Darkest Web, is a BBC Eye investigation for the BBC World Service.

This podcast includes some upsetting scenes, discussions of child sexual abuse, and there’s some strong language.

For further information on the issues raised in the programme, contact support organisations in your own country. For a list of organisations in the UK that can provide support go to bbc.co.uk/actionline.

Reporter and Presenter: Sam Piranty