Just released yesterday ..
Context: She is one of his childhood heroes, and he did not know the character will be played by her. The team even removed the hints from the script. His real reaction to this was not shown before, only the shot on her was in the show.
10 will forever by my number one .. the char as well as the actor.. love them both <3
https://www.youtube.com/watch?v=RWBBkoDCMpc
#DoctorWho #ten #DavidTennant #TenthDoctor