Doctor Who showrunner Russell T Davies says that the mysterious Mrs Flood will be in every episode of season 2, as "spectacular answers" are finally delivered
It's weird because they spent a season playing with Ruby's mom, Susan, Sutekh trying to tell us that important character identity twists are bad, and now here's a new important character that'll have a big identity twist? Really?
In hindsight, not "bad" I suppose, but when they had the big Ruby reveal, they were definitely making fun of everyone who was freaking out just like Sutekh in interviews and everything.