Michelle Gomez “Starting back on Doctor Who Soon”
Speaking in an interview with The Music Brisbane editor Mitch Knox she said: “Weirdly, this is the sort of crunch week where I get to find out exactly what I’m going to be doing next.”
She then adds: “I can officially say that I will be starting back on Doctor Who soon, so that’s one thing.”
UPDATE: Steven Moffat has also confirmed the return in the latest issue of DWM: “Oh, of course Missy will be back,” he said. “How could she not be?”
The magazine additionally confirms the next episodes to film are episodes 5 & 9.