Ive previously mentioned the Adventures With the Wife in Space blog series, in which a couple one a fan, one not work their way through every Doctor Who episode from 1963 on.
Another blog series thats doing the same thing in a very different way is Philip Sandifers TARDIS Eruditorum. (CHT Jesse Walker.) Sandifers series takes a cultural-studies approach, and situates each episode in its historical context (though usually with a title drawn from a later era); hes one season into the Pertwee era now. As with Adventures, Ive gone back and read the whole series from the beginning; I dont always agree with him, but what he has to say is generally fascinating in any case.
Incidentally, I dont know why my comments on his blog keep coming out as being by someone named 7a1abfde-af0e-11e0-b72c-000bcdcb5194. Blon Fel Fotch Pasameer-Day Slitheen would be simple by comparison.