Horizon

Hannah Fry, a professor of maths, is used to investigating the world around her through numbers. When she's diagnosed with cervical cancer at the age of 36, she starts to interrogate the way we diagnose and treat cancer by digging into the statistics to ask whether we are making the right choices in how we treat this disease. Are we sometimes too quick to screen and treat cancer? Do doctors always speak to us honestly about the subject? It may seem like a dangerous question to ask, but are we at risk of overmedicalising cancer?

At the same time, Hannah records her own cancer journey in raw and emotional personal footage, where the realities of life after a cancer diagnosis are laid bare.

The inside story of the James Webb Space Telescope, following the Nasa team building the £8 billion device and the scientists taking its first image of distant stars and galaxies.

Henry Marsh was one of Britain's leading neurosurgeons, operating on thousands of patients over a 40-year career, but after retiring he was diagnosed with advanced prostate cancer. As he awaits his own medical results, Henry tries to discover the lessons that can be learnt from a lifetime dedicated to neurosurgery, meeting the families of the patients who died in his care, as well as exploring the impact his work had on those closest to him, He reveals the huge emotional and personal challenges of a job where every day came with life-and-death decisions.