Deja Vu: The Cybermen coming down the steps of St Paul’s Cathedral in “Dark Water” is a nod to a scene in Patrick Troughton adventure “The Invasion”.
Trivia: “Mummy On The Orient Express” guest star Frank Skinner is a lifelong Who fan. “I’ve got a fivefoot cardboard Dalek in my bedroom and when I got the call saying they wanted me to read for the part, I was in the back of my tour bus watching episode three of ‘ The Sensorites’,” he’s said.
Best Line: The Doctor ( to Clara): “Stop it with the eyes. Don’t do that with the eyes. How do you do that anyway? It’s like they inflate.”