All five episodes of the miniseries, which is in production now, are being directed by Dylan Holmes Williams.

Writing in this month’s edition of Doctor Who Magazine, he said: "In the office, this show is generally shortened to TWB, which makes me think it stands for Torchwood: Birmingham. We’re in the third week of filming. Very exciting!

"The shoot will go on until just before Christmas, and it’s a mammoth task, all wrangled by one director, Dylan Holmes Williams.