How many episodes of doctor who are there?

(See Doctor Who in Australia) The ABC has periodically repeated episodes; of note were the weekly screenings of all available classic episodes starting in 2003, for the show's 40th anniversary, and the weekdaily screenings of all available revived episodes in 2013 for the show's 50th anniversary. read more

From the first Doctor Who episode in 1963, (as of 04|2014) prior to the 8th Season of the revival, there have been 769 episodes aired. However more than a hundred episodes are 'lost' meaning there are no known copies in existence. read more

See this Doctor Who Wiki article. It provides a detailed listing of 'Doctors' and episode counts from 1963 to Nov 2013. You might also find this SciFi.SE.Is there an older Doctor Who series question to have some relevance. read more