Producer David Richardson said: "The Cybermen enter the Time War. And more than that... every kind of Cybermen enters the Time War. Mondasian. Telosian. Whatever their heritage, these half man, half machines will change the stakes in the battle between the Time Lords and the Daleks. But who will this third party favour?"

Writer Jonathan Morris added: "[Script editor] Matt Fitton asked me if I wanted to do a War Doctor story, and I replied going, please can I do the Cybermen? What happened to the Cybermen during the Time War?

"I’ve never done a Cyberman story in twenty-odd years of working for Big Finish. Every now and then I’ve dropped little hints that I'd like to, but this time it's finally happened. All these ideas I've had over the last twenty years about cool things I could do with the Cybermen, I've put into this story."

Lead actor Jonathan Carley said: "When I first took on the War Doctor, I thought, 'We know a lot about what the Daleks and Time Lords are up to, but what about the Cybermen, the other big cheese in the Doctor Who world?' I don't think they've ever been done in this era before.

"This one was sold to me with the opening line of 'every Cyberman ever'. I was in, I was raring to go, and it has not disappointed - it's totally delivered on that, and a few original Cybermen in between."

His co-star Mitra Djalili added: "I absolutely love it. I like a strong female lead and I'm very fortunate to be playing one. When I was a child watching Doctor Who, I never would have thought in a million years that later on down the line I'd be involved. And it's absolutely wonderful.

"I relate to Nesta quite well. I wonder how much of a coincidence it is when I'm offered parts like this, because she's quite brittle, she's quite sarcastic, she doesn't suffer fools gladly. She has the courage of her convictions, but she also does have a soft centre."

Jonathon Carley and Mitra Djalili

Glen McCready, Jonathon Carley, Mitra Djalili, Tracy Wiles, Nicholas Briggs

Mitra Djalili, Clive Hayward, Rachel Atkins, Nicholas Khan, Jonathon Carley

Shogo Miyakita, Mitra Djalili, Jonathon Carley, Harriet Kershaw, Nicholas Briggs, Wayne Forester