1)Like "Revenge of the Cybermen", this was one of the stories that Philip Hinchcliffe felt stuck with by his predecessor, Barry Letts. In the end, he ended up making the story quite a bit more graphic and intense than Letts would've done. Nation did alot of re-writing of Dalek continuity here - I get the impression that even he didn't exactly remember the events of "The Daleks" properly.
2)"We…