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- Season 0 1966-12-25
- Season 1 1964-02-03
- Season 2 1965-01-06
- Season 3 1966-01-02
- Season 4 1967-01-17
- Season 5 1968-01-02
- Season 6 1969-01-02
- Season 7 1970-01-05
- Season 8 1971-01-04
- Season 9 1972-01-03
- Season 10 1973-01-04
- Season 11 1974-01-07
- Season 12 1975-01-20
- Season 13 1976-01-05
- Season 14 1977-01-07
- Season 15 1978-01-06
- Season 16 1979-02-26
- Season 17 1980-01-14
- Season 18 1981-01-05
- Season 19 1982-01-11
- Season 20 1983-01-10
- Season 21 1984-01-09
- Season 22 1985-01-07
- Season 23 1986-01-06
- Season 24 1987-01-05
- Season 25 1988-01-04
- Season 26 1989-01-09
- Season 27 1990-01-08
- Season 28 1991-01-07
- Season 29 1992-01-06
- Season 30 1993-01-04
- Season 31 1994-01-10
- Season 32 1995-01-09
- Season 33 1996-01-08
- Season 34 1997-02-27
- Season 35 1998-02-19
- Season 36 1999-01-28
- Season 37 2000-01-12
- Season 38 2001-01-25
- Season 39 2002-01-10
- Season 40 2003-01-09
- Season 41 2004-01-08
- Season 42 2005-01-13
- Season 43 2006-01-12
- Season 44 2007-03-13
- Season 45 2008-01-15
- Season 46 2009-01-26
- Season 47 2009-10-13
- Season 48 2010-09-26
- Season 49 2011-08-08
- Season 50 2012-07-23
- Season 51 2013-08-12
- Season 52 2014-08-17
- Season 53 2016-03-16
- Season 54 2017-01-19
- Season 55 2018-02-05
- Season 56 2019-01-23
- Season 57 2020-01-16
- Season 58 2021-01-04
- Season 59 2022-03-31
- Season 60 2024-07-22
Season 60 Episode
- Season 3 Windows of the Soul / Elixir of Youth
- Season 3 The Troubled Mind / Triple-A. S.
- Season 3 A Man of Two Visions / The Scientist Applied
- Season 3 The Dolphins that Joined The Navy / A Theory of The Earth
- Season 3 Route 128
- Season 3 The Beginning of Life / Science Friction
- Season 3 So you want to be an Inventor? / The Severed Hand
- Season 3 Chance and Decay / Meteorite Mystery
- Season 3 Towers of Ilium / The Exploding City
- Season 3 Man in Space
- Season 3 Destination Mars / Editors in Conference"
- Season 3 Man meets Duck / The Picture Machines
- Season 3 Where must the Money Go? / Phantoms Incorporated
- Season 3 Genes in Action / Scientists and War
- Season 3 The Lonely Children
- Season 3 Man of Science / 'Nature' Tomorrow
- Season 3 M.I.T.'s ABC / The Disturbed Child
- Season 3 Ten Years in the Antarctic
- Season 3 The Athlete
- Season 3 From Peenemunde to the Moon
- Season 3 Sex-Change?
- Season 3 The Structure of Life
- Season 3 The Wages of Science
Horizon - Season 3 Episode 4 The Dolphins that Joined The Navy / A Theory of The Earth
7.40 60 minutes Horizon looks at the research of dolphins being conducted at a United States naval base in Port Magu, California. The research concentrates on the dolphin's abilities of navigation.
The eminent Canadian geologist, Professor Tuzo Wilson, explains his new 'Froth on the Broth' theory of the structure of the earth to David Wilson.
