Specials
September 24, 1984 | 12 Episodes
Season 1
October 30, 1983 | 10 Episodes
Season 2
May 6, 1984 | 8 Episodes
Season 3
November 4, 1984 | 15 Episodes
Season 4
September 15, 1985 | 20 Episodes
Season 5
October 5, 1986 | 17 Episodes
Season 6
September 20, 1987 | 13 Episodes
Season 7
September 18, 1988 | 14 Episodes
Season 8
October 1, 1989 | 16 Episodes
Season 9
January 6, 1991 | 14 Episodes
Season 10
November 24, 1991 | 13 Episodes
Season 11
January 3, 1993 | 16 Episodes
Season 12
February 20, 1994 | 14 Episodes
Season 13
November 27, 1994 | 15 Episodes
Season 14
January 14, 1996 | 12 Episodes
Season 15
October 6, 1996 | 17 Episodes
Season 16
October 19, 1997 | 19 Episodes
Season 17
October 11, 1998 | 18 Episodes
Season 18
October 3, 1999 | 17 Episodes
Season 19
October 8, 2000 | 18 Episodes
Season 20
October 7, 2001 | 16 Episodes
Season 21
October 13, 2002 | 15 Episodes
Season 22
October 12, 2003 | 17 Episodes
Season 23
October 14, 2004 | 14 Episodes
Season 24
October 19, 2005 | 18 Episodes
Season 25
October 18, 2006 | 17 Episodes
Season 26
April 4, 2007 | 11 Episodes
Season 27
January 4, 2008 | 17 Episodes
Season 28
November 11, 2008 | 16 Episodes
Season 29
October 28, 2009 | 14 Episodes
Season 30
July 8, 2010 | 14 Episodes
Season 31
August 1, 2011 | 14 Episodes
Season 32
July 19, 2012 | 10 Episodes
Season 33
May 17, 2013 | 10 Episodes
Season 34
April 11, 2014 | 10 Episodes
Season 35
February 24, 2015 | 10 Episodes
Season 36
April 14, 2016 | 9 Episodes
Season 37
March 20, 2017 | 8 Episodes
Season 38
March 31, 2018 | 8 Episodes
Season 39
April 7, 2019 | 9 Episodes
Natural World
(1983)
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