This episode is sponsored by Cadbury Heroes.

If the past teaches us anything, it's this.

One great individual can change a moment, but when a group of great individuals come together,

that's when history is made.

Take the codebreakers at Bletchley Park, Turing, Clark, Welchman, each a genius in their own right, but together

they cracked the uncrackable code that won the war. Or those heroic swashbucklers, Dark Tannion

and the three musketeers, one for all and all for one. Or even nine of Cadbury's best chocolates

in one single tub. All heroes, no zeros, every last one of them. Cadbury Heroes.

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Nine delicious chocks in one single tub. All heroes, no zeros. It is the winter of 1649.

A bitter wind whips along the River Thames, howling through Trater's Gate at the Tower of London.

A man named Sir Henry Mildmay, master of the jewels, nods to a warder who lets him enter the white tower.

For the first time since the 9th century, England has no monarch. Last year, King Charles

I was beheaded following a civil war. The parliamentarian Oliver Cromwell now rules a republic

known as the Commonwealth of England.

It has been a year of upheaval, to say the least.

Sir Henry Mildmay enters a room that holds the precious and valuable object of state, the crown jewels.

A simple wooden trestle table is covered with gold, silver and bronze.

Pearls gleam in a shaft of morning sun.

The light plays on stones of every colour which adorn the treasures.

In a workshop next door, a team of goldsmiths are already at work despite the early hour. Sir Henry is here to give the workers their instructions, but he lingers in the jewel house.

He picks up a crown that catches his eye.

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