"The Snowmen"

Doctor Who Extra: 5 Thoughts About "Vastra Investigates"

If Steven Moffat isn't angling to convince fandom to demand a Madame Vastra Investigates spin-off from Doctor Who, then it's hard to imagine what he's up to with the second prequel to this year's Doctor Who Christmas Special. Five quick thoughts about "Vastra Investigates," perhaps? Why not?