May 13th, 2012
1975 was the last year that everything changed for Doctor Who. We’ve seen that there are three main forces behind the feel of Doctor Who , the producer, the script editor, and the star. Season 12, which started in the last week of 1974, was the last time that all three would change at once during the show’s original TV run. (Technically, producer Barry Letts stayed on for the first story of the season, after Pertwee and script editor Terrance Dicks had already left).