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Maud's best friend Elizabeth has disappeared, but as she tries to solve the mystery, dementia threatens to erase all the clues, giving the search a poignant urgency.

On Thursday 7th July 2005 four suicide bombers struck in Central London. Within an hour 52 people were killed and 770 wounded in an attack that brought London to a standstill. On the tenth anniversary of the 7/7 attacks, this documentary recounts the events of that day, paying tribute to the bravery of survivors and rescuers and commemorating those who lost their lives.

We all know about Alexandria, one of the greatest cities of the classical world, with its great Library and fabled Lighthouse. But Heracleion? A great port and religious centre at the mouth of the Nile, it was mentioned by the likes of Herodotus, but at some point it vanished, and its location became unknown.

In this critical investigation into the most arresting victims of the climate emergency, biologist Ella Al-Shamahi joins a specialist autopsy into the death of a 40-foot sei whale, which washed up near Edinburgh. Across the 90-minute single doc, Ella sets out to uncover why whales are dying in record numbers and whether or not the crisis is man-made.

Virologist Dr Chris van Tulleken embarks on a global investigation into the hunt for the pathogen that could trigger the next pandemic and the cutting-edge science developed to tackle it. Known only as ‘Disease X’, it is shrouded in uncertainty. Its origin is unknown, how it could spread is unclear, but its impact could be much more severe than Covid-19. To uncover what Disease X might be, where it could emerge and what traits it needs to spread, Chris follows the paths of past deadly viruses. He visits the ground zero of the Nipah virus in Malaysia, which inspired the film Contagion. He also heads to the front line of the ongoing bird flu outbreak in US dairy cattle in California.

What killed King Tutankhamun? Ever since his spectacular tomb was discovered, the boy king has been the most famous pharaoh of all ancient Egypt. But his mysterious death, at just 19 years old, has never been explained. In this BBC One special, presenter Dallas Campbell reveals new scientific research and carries out unique experiments to get to the truth. For the first time, a virtual autopsy of Tut's mummified body reveals astonishing secrets about the pharaoh. Using CT scan data, the programme creates the first ever full size, scientifically accurate image of the real Tutankhamun. Brand new DNA analysis uncovers a shocking secret about Tut's family background, and the genetic trail of clues leads to a radical and revolutionary new theory to explain Tut's sudden and unexpected death. This is an epic detective story that uncovers the extraordinary truth of the boy behind the golden mask.

On 13 March 1996, a gunman walked into a primary school in the small Scottish town of Dunblane near Stirling, and shot dead 16 pupils and their teacher in a Primary 1 gym class. To date, it is one of the deadliest firearms atrocities in the UK. In a landmark film to commemorate the 20th anniversary of the tragedy, 'Dunblane: Our Story' interviews many people who have never before talked publicly about what happened on that day.