Click here to watch: Why we love Jackie Tyler!

Producer and script editor Matt Fitton said: "After their little trip into the future in Cloud Eight the Doctor and Rose are back to the Powell Estate - once again that mysterious elastic band bringing them back. They find the place in complete turmoil, with loads of historical figures running amok.

"Katherine Armitage is great at creating a really vivid story world, filling it with characters, and finding a high concept idea to spin off on. It's really interesting to look at places around London, places where people live, and think about how much history there is there."

Writer Katherine Armitage explained the idea behind her story: "I was thinking about the idea of history as this very highfalutin thing which belongs in books and dusty libraries. And actually, when you walk around London, one of the things I love is the blue plaques - there’s a nondescript little house, and someone amazing lived there for a while. These people are hiding everywhere.

"And so I had the idea of making them come to life, an estate being overrun by people of the past - but then, obviously, there's got to be something sinister behind them! Pandemonium means where all the devils are...

Lead actor Christopher Eccleston said: "The emotional stakes are very high in this episode! It touches very strongly on the themes and events of Father's Day and brings Rose very close again to this notion of changing time, which is a point of tension between her and the Doctor. Plus, the Doctor's frustrated about being stuck on Earth - and he's more frustrated about being stuck with Jackie!"

His co-star Billie Piper added: "This episode is a history lesson with all the tropes of a great drama, and loss and grief. It deals with the sadness of the past and people having to come to terms with that. It's a hard experience for Rose because it closes up the story of her and her dad."

And Camille Coduri, who plays Jackie Tyler, said: "Kat’s really honoured Russell's work, in the way that she's put a hand in your chest and pulled out your heart a few times. This is what we all love about Doctor Who, isn’t it? The strangeness, the scariness, the comedy, and these brilliant historical characters. It's just fantastic to be a part of that."

Christopher Eccleston and Billie Piper

Helen Goldwyn (director), Kate Harbour, Nick Denning-Reed, Clive Hayward, Katharine Armitage (writer)

Nick Denning-Reed, Kate Harbour, Clive Hayward

Camille Coduri