10 Awesome Doctor Who Ideas That Nearly Happened

50th anniversary special The Day of the Doctor was a triumph, and celebrated everything that made the programme so wonderful and special.

One element that contributed to this was the much-anticipated return of David Tennant as the Tenth Doctor, alongside John Hurt as a totally new incarnation of the Doctor known as the War Doctor.

However, the special was originally going to be a very different episode, and would've seen all of the modern Doctors onscreen together.

When writing those early drafts of the story, Steven Moffat spoke to Christopher Eccleston about returning as the Ninth Doctor. Eccleston listened to what Moffat had to say, but upon reading the script, politely said that it wasn't right for him. As a result, Moffat created the War Doctor to fill the gap that was intended for Nine.

Eccleston has since admitted that he's not a fan of multi-Doctor stories in general, so that's probably another reason he was reluctant to join Smith and Tennant in the episode. But needless to say, it would've been amazing to see.