Ever since we introduced Vastra, Jenny and Strax in A Good Man Goes to War , people have been asking to see them again. And, of course, they’ve already been in The Snowmen at Christmas, but I thought it was time to start a story from their point of view — to see them tackle a case of their own, and stumble across the doctor’s path, quite accidentally. I didn’t quite know what to do with that idea, but I knew I wanted something insane, terrifying and Victorian — I have no idea why Mark Gatiss sprang to mind.
Mark, of course, is never content with just writing a show; he has to cast it, too. For the first time ever, at Mark’s suggestion, mother and daughter Diana Rigg and Rachael Stirling, appear together!
Written by Mark Gatiss
Directed by Saul Metzstein
Guest stars Diana Rigg (Mrs Gillyflower), Rachael Stirling (Ada), Neve McIntosh (Vastra), Dan Starkey (Strax), Catrin Stewart (Jenny)
Doctor Who: The Crimson Horror is on Saturday 4 May.