According to DoctorWhoTV:
More or less confirmed by Moffat earlier in the year, Neve McIntosh has spoken briefly about the return of Madame Vastra and the Paternoster Gang in Peter Capaldi’s debut series next year.
McIntosh told the Daily Record: “It will be sad not to be working with Matt again but I’m really looking forward to Peter taking over and seeing what he does with it.
“We’ll be helping the Doctor more, but I can’t say anything else.”
McIntosh also says that she would like the show to be ‘edgier’: “The sexual themes in Doctor Who should be talked about more and embraced more. It could be edgier and more dangerous.”
On the endlessly discussed Paternoster spin-off, she said: “We can do so much in Victorian times, it’s got that steampunk edge to it. Think how freaky that era was with the Elephant Man and all that and just add us into the mix, with time travel and all sorts of weird, wonderful stuff.”