A behind the scenes look at how David Tennant's old man prosthetic was created and applied, and used in the series 3 finale. Taken from Tennant's Video Diaries from series 3.
The way David said "thus far" makes it sound like he's just going to sneak out one day and walk around in the prosthetics to do...one can only imagine.
This video is funny of course David looks handsome when the video started then he gets turned into a grandpa figure I wish he was my grandpa because I don't have one :( I love when he said "oh yes" he says it so funny and when he was playing with his throat in the makeup XD David is a real trooper when it comes to turning into a 150 year old person for the third season.