Just over four years on, we know it all turned out okay for Doctor Who’s 50th Anniversary. “The Day of the Doctor” broke broadcast records at the time and turned out to be warmly received. But it’s kind of spectacular just how close it came to being a complete and utter disaster, a prospect even scarier than any villain the Doctor had ever faced down in 50 years of time travel.

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You can see the Moffat’s full thoughts on writing the special, as well as everything from taking over Doctor Who to the misfire of the show’s giant-sized redesign of the Daleks in the full interview below (the first part can be found here, too!).