This is the art I did for a poster (of a Doctor Who Convention, but that's easy to figure it out)
I tried to put at least one reference to each Doctor (let's see who can guess what is what, most of them are pretty obvious actually)
a few of them got more than one.
I couldn't fill with in-jokes about the show because that could alienate the target audience (but one day, I shall make an illustration of werewolf Benton chasing the Cheetah Master, or Soldeed telling his therapist about his dreams and math problems, or The Terrible Zodin...
although that last one can be a bit of a challenge.
There is the colorized version too, with colors by Here