Nature
Season 9
Episodes
Episode 1
Sep 30, 1990
Episode 2
Oct 7, 1990
Episode 3
Oct 14, 1990
Episode 4
Oct 21, 1990
Episode 5
Nov 11, 1990
Episode 6
Nov 18, 1990
Episode 7
Nov 25, 1990
Episode 8
Dec 2, 1990
Episode 9
Dec 9, 1990
Episode 10
Dec 16, 1990
Episode 11
Jan 13, 1991
Episode 12
Feb 17, 1991
Episode 13
Feb 24, 1991
Episode 14
Mar 3, 1991
Episode 15
Mar 10, 1991
Episode 16
Mar 17, 1991
Episode 17
Mar 24, 1991
Episode 18
Apr 7, 1991
Episode 19
Apr 14, 1991
Episode 20
Apr 28, 1991
Episode 21
May 12, 1991