In the yoo-ess at least, the most well-known of the Doctors in the Doctor Who series. Also has a brief cameo in a Simpsons episode.

Has a penchant for eating what I recall him calling "Jelly Babies" which are very similar to Jelly Bellys.

Grins excessively which once earned him a description I read on Usenet as "looking like he has more teeth than brain cells".