- Who
- Doctor Who
- What
- 694 total number
- Where
- Not Applicable ()
- When
- 1989
The original run of science-fiction series Doctor Who (BBC, UK) aired 694 episodes consecutively across 26 seasons between 23 November 1963 and 6 December 1989.
In terms of duration, the original run was on air for 26 years 14 days.