Why 2013 won’t just be the 50th anniversary for Doctor Who…
Doctor Who, as well as celebrating its “round number” anniversaries, (The Three Doctors, The Five Doctors, and, err, Silver Nemesis and so on) has also used the story or episode count to blow its own trumpet (for more media coverage).
Story 150? Dragonfire, which was announced as such. (Though that meant counting Season 23 as more than one story.)
Story 200? The Planet of the Dead, the number of the bus in the story too.
500th episode? The Armageddon Factor episode 1. (Tom Baker was interviewed by Pebble Mill at One for this momentous occasion.)
600th episode? The King’s Demons episode 1. (The Radio Times made a thing of it.)
However the event of the broadcast of the 700th episode – Aliens of London – was overshadowed by the sheer novelty of Doctor Who being on television.
784 episodes already exist, and the next season (starting Autumn 2012 and ending sometime 2013) has 14 episodes announced – the next two episodes after that will mean the magic 800.
So, as “Steven Moffat hints at multiple Doctor Who 50th anniversary specials” – it could be a 50th anniversary special will also be the 800th episode!