List of Horizon (British TV series) episodes

Horizon is a current and long-running BBC popular science and philosophy documentary programme. Series one was broadcast in 1964 and it is in its 56th series. Over 1,250 episodes have been broadcast (including specials) with an average of 23 episodes per series during the 56-year run.


 * 1964–1969 – 135 episodes
 * 1970–1979 – 299 episodes
 * 1980–1989 – 234 episodes
 * 1990–1999 – 220 episodes
 * 2000–2009 – 191 episodes
 * 2010–2019 – 167 episodes
 * Since 2020 – 16 episodes

Series 39: 2002–2003
Horizon Revisited was broadcast on BBC Four and shown between 2002 and 2003. Each of the seven episodes takes information and clips from previous edition of Horizon and updates them with current thinking on each of the topics at hand. These are similar in format to the current 'Horizon Guide' special episodes.