The BBC has launched the beta of something called Genome which is the digitisation of every Radio Times from 1923 – 2009. Of course the first thing I did was search for Doctor Who and got a ridiculous number of hits (10 pages worth).
You can drill down and look for something specific – I tried Krotons. You don’t get much except the content but it is mildly fascinating to browse around and get some episode details and see what else was being shown on the BBC at the same time.
You don’t get many covers (maybe these will follow) but there are some of interest such as that for Doctor Who The Movie. Apart from that do let me know what you find in the Genome archive.