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- Season 0 1966-12-25
- Season 1 1964-02-04
- 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 2010-09-27
- Season 49 2011-08-08
- Season 50 2012-07-23
- Season 51 2013-08-12
- Season 52 2014-08-18
- 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 30 Awakening the Frozen Addicts
- Season 30 Cheating Time
- Season 30 TB - The Forgotten Plague
- Season 30 No Ordinary Genius (1)
- Season 30 No Ordinary Genius (2)
- Season 30 Mars Alive
- Season 30 Suggers, Fruggers and Data-Muggers
- Season 30 The Pyramid Builders
- Season 30 Here Be Monsters
- Season 30 Iceman (Update)
- Season 30 Whatever Happened to Star Wars
- Season 30 Resurrecting the Dead Sea Scrolls
- Season 30 Dante Goes to Hell
- Season 30 Ghosts in the Dinosaur Graveyard
- Season 30 The New Alchemists
- Season 30 Allergic to the 20th Century
- Season 30 Wot U Looking At?
- Season 30 The Electronic Frontier
- Season 30 A Vital Poison
- Season 30 Chimp Talk
- Season 30 Life is Impossible
Horizon - Season 30 Episode 7 Suggers, Fruggers and Data-Muggers
7.40 60 minutes Horizon investigates how market research, opinion polls, TV ratings, and consumer surveys have got it disastrously wrong. Commercial decisions depend increasingly on this information, but just how good is that information?
