2. Zygon Century: Transformation

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Zygon Century

Available April 2026

Written by Jonathan Barnes Lauren Mooney Stewart Pringle Ken Bentley

Starring Eric Roberts Charlie Russell

This release contains adult material and may not be suitable for younger listeners.

From US $27.22

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About
Backstage
Cast
Production Credits

The Zygons have come to claim the Earth, and this time they're playing the long game. For the Black Cadre have a plan, a plan that will take exactly one hundred years to come to fruition.

From the streets of St Petersburg to the plains of Death Valley, the Zygon Century continues...

1922: The Black Cadre by Jonathan Barnes
From Munich to Dublin to an asylum in Dartmoor, the Zygons have agents everywhere, and their plans are growing in scope and ambition.

Can Herbert Scott, that long incarcerated investigator of the occult, do anything to stop them? Is his rescuer - the German heiress, Ilse Lange - all that she seems? And why are the Black Cadre so interested in a mysterious carnival, travelling the wilder reaches of the Cornish coast?

1968: An Incident in Death Valley by Lauren Mooney & Stewart Pringle
Fleeing her brutal human captors, and in hiding from the Black Cadre, the Zygon Vorvoren arrives at a run-down diner in the bowels of Death Valley. There, she finds a friend in Junie, a young waitress, and a town terrorised by a ruthless cult.

But just who is their mysterious leader, 'The Arkon'? And could he really hold the key to Vorvoren's liberation and revenge?

1974: The Caldwell Restitution by Ken Bentley
Agent Caldwell has been posted to the British Embassy in Moscow and ordered to investigate a rising star of the Communist Party. But Caldwell is a shadow of his former self, plagued by nightmares of the past and misty visions of the future.

As the Third Doctor enters the fray, human and Zygon plots collide, and Caldwell's visions threaten to endanger the world. Though neither man can remember the other, can the Doctor and Caldwell put a stop to the Zygon Century, once and for all?

**Please note: the collector’s edition CD box set is strictly limited to 1,000 copies**

Recorded on: 28 April, 9-10 September 2025

Recorded at: The Soundhouse

Producer Jonathan S Powell said: "Zygon Century is back - and the invasion's gone international! After the success of Infiltration, Jonathan Barnes and I were keen to push ourselves further and show our band of Zygons on the offensive. In these three exciting new episodes, we'll take you across the twentieth century, from Russia to Dublin to Death Valley, and reveal more of the Black Cadre's simmering masterplan.

"I'm immensely proud of Zygon Century - it's Doctor Who but it's also proper character drama, and goes places the main series can't. There are many more stories still to be told, and we hope you enjoy these next three.

"This time around we're welcoming not one but two iconic Doctor Who characters into the Zygon Century fold. But what does the Master want with the Black Cadre? And what on earth is the Third Doctor doing in Soviet Russia? Schemes are unravelling, destines are converging, and all roads lead to world's end. But is humanity ready?"

Script editor and writer Jonathan Barnes added: "I was very keen to come back to our three main characters for the second box set. So we have Herbert Scott, the occult investigator, Vorvoren, the most sympathetic Zygon in the entire series, and Agent Caldwell.

"Not all of these people will survive to the end of the series, and there's going to be many unexpected developments in their stories going forwards. One of the great advantages of writing a Doctor Who spin-off is that we don't have the Doctor for great swathes of these stories, so we have protagonists whose destiny is unclear. That's exciting to work with."