After watching through the new series of Doctor Who again, I decided to do a little searching for some classic Who - after all, I wanted to know the roots of the new show, and see some of the older Doctors (especially the Fifth, after seeing the Time Crash special). Somehow, I stumbled onto this site - and man, oh man is it awesome.
Essentially, it is a huge archive of videos spanning across every season of Doctor Who. I haven't dug through the entire site yet (just started watching "The Daleks" from the First Doctor's era) but it looks to be pretty damn good. From what I can tell, it even has full footage of the "missing" episodes - the ones that were wiped from the BBC's archives back when such a practice was commonplace. Again, I haven't looked through every single episode on there, but they seem to have at least a grand majority of them.
So, if anybody is interested in revisiting the classic Doctor Who episodes, here's the site for you.
http://www.doctorwho-episodes.com/
(This is not intended as spam in any way, shape or form - I'm merely trying to help out anyone hoping to find classic Who episodes from the original 26-season run, since from my experience they are very hard to find)