In the 1950s, a devastating fog descended on London and enveloped the capital for several days, leaving Londoners lost in their own streets in one of the UK's biggest peacetime catastrophes.

Doctors and twins Chris and Xand van Tulleken's experiences through the Covid-19 pandemic have far more personal consequences than either could have imagined.

Xand Van Tulleken and Tracy Borman examine the plot to kill James I by blowing up the House of Lords when the king would be present for the State Opening of Parliament. They follow Robert Catesby and his co-conspirators as they assemble their gang to carry out the attack, revealing just how dangerous it was to smuggle two and a half tons of gunpowder beneath the House of Lords, and show how the assassination of so many people in Parliament was meant to be the beginning of an audacious coup to take over the country.

On the 100th anniversary of Howard Carter first unwrapping the mummy of Tutankhamun, Dr Xand van Tulleken sets out to reexamine the six extraordinary days it took to reveal the Boy King beneath the bandages.