The Doctors Revisited will be broadcast at weekends, with the premiere of The First Doctor to be shown on Saturday 12th October at 2:00pm, followed by the accompanying story The Aztecs; Sunday will then see The Second Doctor at the same time, accompanied by The Tomb of The Cybermen. The following weekend then sees The Third Doctor on the Saturday alongside Spearhead From Space, and The Fourth Doctor alongside Pyramids of Mars on Sunday.
The documentaries were orginally broadcast monthly by BBC America, and were shown in Australia and New Zealand during August by BBC Worldwide's UKTV.
Other programming to accompany the launch of Doctor Who Revisited on the 12th October includes the documentaries The Companions at 4:30pm and Doctor Who Explained at 5:30pm, both of which are repeated before The Second Doctor on the Sunday.
Watch's schedules don't currently extend beyond the 20th October, but based on the pattern above the Fifth and Sixth Doctors are expected for 26th/27th October, Seventh and Eighth on 2nd/3rd November, Ninth and Tenth on 9th/10th November, and the Eleventh on the 16th - completing the series one week before the 50th Anniversary itself!
(with thanks to SciFiBulletin)