Tortoise Investigates

Journalist Rachel Sylvester investigates the case of 'Australia's worst serial killer'. And discovers, in a story about mothers who have been accused of murdering their own children, there is one man who connects them all: a doctor called Roy Meadow. Our thanks to The Francis Crick Institute for sharing recordings and insights.

Kathleen Folbigg is just trying to survive. She's a grieving mother, sentenced to life in jail for killing her four infant children. That is, until a small group of people start to question whether she might be the victim of a terrible miscarriage of justice. Our thanks to The Francis Crick Institute for sharing recordings and insights.

Scientist Carola Vinuesa and her team test their extraordinary genetic discovery in a court of law. Our thanks to The Francis Crick Institute for sharing recordings and insights.

Rachel Sylvester travels to Greece to investigate whether genetic science could change the story in the case of Roula Pispirigou – a mother who was convicted of killing her three young children just last year. Our thanks to The Francis Crick Institute for sharing recordings and insights.

Kathleen Folbigg experienced unimaginable loss. All four of her infant children died suddenly, over a 10-year period. Their deaths were unexplained. Until a police detective turned up at her door, and arrested Kathleen on suspicion of murder. She was labelled ‘Australia's worst female serial killer', convicted, and was destined to spend most of the rest of her life in jail. Until a different type of detective entered her life. A scientist working in a lab who uncovered the truth behind the deaths. This is the story of a shocking miscarriage of justice, but as journalist Rachel Sylvester starts to investigate how this happened, she learns that Kathleen is not alone – other mothers have endured the same fate, and may also be in prison. The Lab Detective is a story about the power of science, and the determination of those searching for the truth.

Chloe hears from a former teacher who seems to support what Gareth believes - that there was a cover-up. And it's still going on today.

Gareth is convinced that his memories are true and that there are plenty of witnesses who can corroborate his story, so why will no one help him?

Sally Anne Bowen doesn't want to speak about her relationship with Gareth, but it turns out there is a way of hearing her version of events. And after months of searching, Chloe gets a message from another ‘lucky boy'.

Gareth spent years believing he was a lucky boy. He was the 14-year-old who got the attention of the attractive young science teacher. Now, decades later, he wants the truth to come out about the damage it's caused him. But his story is not straight forward.

Gareth's whole life has been defined by a relationship he had 35 years ago when, as a 14-year-old schoolboy, he fell in love with an attractive young teacher at his school. He spent most afternoons in her bedroom and thought he was the luckiest boy in the world. But when she walked out of his life everything started to unravel. Lucky Boy is a new four-part series in which Chloe Hadjimatheou asks who gets to be a perpetrator and a victim.

In 2018, Vernon Unsworth is at the centre of a global news story. He plays a crucial role in rescuing a young football team who became trapped in a flooded cave system. Overnight, he is a hero. But there's a darker side of his story that's less well known. That's where Elon Musk and his private investigators come in...

When Martin Tripp worked at Tesla, he took the advice of his boss Elon Musk - if you discover a problem, tell me about it. But when Martin shares his concerns, his world begins to spiral out of control.

Elon Musk is one of the most powerful men in the world. He's a billionaire, the founder of SpaceX, Tesla and more. To his followers, he's a hero; to his critics, a far-right rabble rouser. But for someone so public, there's one part of his life that's less well known. Elon's Spies investigates how this free-speech champion uses private investigators and surveillance to target everyone from whistleblowers at his companies, to online critics and people in his own life.

To his surprise, Alexi finds himself speaking to a local reporter at the Gold Coast Bulletin in Australia. It's not where he thought the story would take him but it reveals a new case involving Elon and his spies.

When Donald Trump declared victory in the US presidential election, he told an adoring crowd that "a star is born". He was referring to Elon Musk. After months of reporting on the billionaire's use of private investigators, Alexi asks whether the insights he gained from that investigation reveal how Musk will operate in his new political era, and what that means for everything in his orbit.

The former nanny who alleges Neil Gaiman sexually assaulted her shares her WhatsApp messages with him. The messages appear friendly and affectionate. He says they're evidence that she consented to sex with him. But is there another way of reading them?

New Zealand police tell the former nanny there isn't enough evidence to actively pursue her sexual assault complaint against Neil Gaiman. He says he offered himself up for an interview with the police. But the facts may indicate otherwise. Clip: 1968 interview with Neil Gaiman - BBC Clip: Big Bang Theory, series 11, episode 21 - CBS/Warner Bros

Almost a month since the investigation where two women came forward with allegations that the author Neil Gaiman sexually assaulted them - allegations he strenuously denies - more women have come forward. Including another woman made to sign a non-disclosure agreement.

A fifth woman has come forward with allegations against the author Neil Gaiman

The second woman to allege Neil Gaiman sexually assaulted her first met him as an 18-year-old fan. They began a consensual sexual relationship two years later. She alleges he was abusive and once penetrated her without her consent. He strenuously denies any unlawful behaviour and maintains all their sex was consensual.