She says the episode has surpassed Chris Chibnall’s episode for using the biggest set in Doctor Who history.
“We’ll have more physical Daleks in the room than ever before in the history of Doctor Who. The running total is somewhere between 20 and 30 real ones.
“We’re collecting every Dalek known to man. Lots of different Daleks. It’s going to be great.”
She also confirms that a day of the Spanish shoot for use in Episode 3 was also used for the Series 7 opener
“We did a day in the snow while out in Spain for Episode 3 and it looks amazing, like James Bond meets Inception.”