1964
1964•9 episodes
Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Documentary
Seasons
63 seasons · 1285 episodes
1965
1965•24 episodes
1966
1966•23 episodes
1967
1967•23 episodes
1968
1968•24 episodes
1969
1969•37 episodes
1970
1970•37 episodes
1971
1971•32 episodes
1972
1972•33 episodes
1973
1973•32 episodes
1974
1974•33 episodes
1975
1975•26 episodes
1976
1976•30 episodes
1977
1977•23 episodes
1978
1978•24 episodes
1979
1979•25 episodes
1980
1980•25 episodes
1981
1981•27 episodes
1982
1982•22 episodes
1983
1983•24 episodes
1984
1984•22 episodes
1985
1985•16 episodes
1986
1986•22 episodes
1987
1987•22 episodes
1988
1988•25 episodes
1989
1989•20 episodes
1990
1990•20 episodes
1991
1991•23 episodes
1992
1992•19 episodes
1993
1993•21 episodes
1994
1994•21 episodes
1995
1995•20 episodes
1996
1996•16 episodes
1997
1997•15 episodes
1998
1998•18 episodes
1999
1999•14 episodes
2000
2000•19 episodes
2001
2001•11 episodes
2002
2002•18 episodes
2003
2003•19 episodes
2004
2004•18 episodes
2005
2005•20 episodes
2006
2006•19 episodes
2007
2007•9 episodes
2008
2008•17 episodes
2009
2009•18 episodes
2009-2010
2009•14 episodes
2010-2011
2010•15 episodes
2011-2012
2011•13 episodes
2012-2013
2012•16 episodes
2013-2014
2013•11 episodes
2014-2015
2014•18 episodes
2016
2016•16 episodes
2017
2017•15 episodes
2018
2018•13 episodes
2019
2019•6 episodes
2020
2020•8 episodes
2021
2021•4 episodes
2022
2022•4 episodes
2024
2024•1 episode
2025
2025•4 episodes
2026
2026•1 episode
Specials
1966•111 episodes