For those of you not following my Tumblr, I will be uploading one of my Doctor sketches up each day leading up to the Time of the Doctor Christmas Special. Each Doctor caricature takes roughly an hour to draw from sketch to final inking. All 12 were done over the course of 3 days.
Here is the Fifth Doctor played by Peter Moffet (not the be confused with Doctor Who writer Peter Moffat, both have no relation to current show runner Steven Moffat) as known by his stage name Peter Davison, father of Georgia Moffett who is wife of Tenth Doctor David Tennant.
You can see all the Doctor pictures on the Regeneration Chart