Doctor Who: 10 Things You Never Knew About The Day Of The Doctor

9. The Time War Was Extended Into The Classic Series

It's long been a theory among some Whovians that the Time War had its roots all the way back in the classic series, going back to the Fourth Doctor serial Genesis of the Daleks. In that story, the Celestial Intervention Agency, a top secret Time Lord organization, sent the Doctor to Skaro in order to stop Davros from creating the Daleks. The Doctor failed, of course, and the Daleks continued to plague him throughout the rest of the classic series and well into the revived show. Some Whovians believe that it was this foiled plot against the Daleks' creation that started the Time War in the first place. Whether this was, in fact, the cause of the Time War remains unclear, but The Day of the Doctor did confirm that the Time War was happening at least as far back as the Fourth Doctor. In the 1975 serial Terror of the Zygons, the titular aliens stated they were looking for a new planet because their own had been destroyed. Queen Elizabeth I, impersonating the Zygon leader in The Day of the Doctor, revealed the destruction of the Zygon home planet was a result of the Time War. There were two Seventh Doctor episodes, Remembrance of the Daleks and Silver Nemesis, that hinted at enormous conflicts looming on the horizon, which could conceivably have been related to the Time War, but the revelation that part of the Time War was being fought right in the middle of the classic series adds a whole new dimension to the golden age of Doctor Who.