Doctor Who: 14 Cool Details Steven Moffat Just Revealed About The Day Of The Doctor

10. David Tennant's First Scene Was Also His First Day On Set

David Tennant doesn't appear until 20 minutes into the story, with his introductory scene revolving around the Tenth Doctor's relationship with Queen Elizabeth I. Oh, and he's also hunting down a Zygon - because this man never stops working!

According to Moffat, this scene was also Tennant's first day on set, with the actor donning his iconic costume for the first time in roughly four years. Just imagine being present for that moment - the entire crew probably had goosebumps.

This was such a memorable day on set that producer Marcus Wilson mused that it was like "live archive footage". Truly, it must've been both bizarre and brilliant to have Tennant back playing the character again.