Season 1 aired between 03 Mar 1974 and 26 May 1974, 13 episodes.
Episodes
E01
The Making of a Natural History Film
03 Mar 1974
E02
Where Did the Colorado Go?
10 Mar 1974
E03
Whales, Dolphins, And Men
17 Mar 1974
E04
The Search For Life
24 Mar 1974
E05
Last of the Cuiva
31 Mar 1974
E06
Strange Sleep
07 Apr 1974
E07
The Crab Nebula
14 Apr 1974
E08
Bird Brain: The Mystery of Bird Navigation
21 Apr 1974
E09
Are You Doing This For Me, Doctor?
28 Apr 1974
E10
The First Signs of Washoe
05 May 1974
E11
The Case of the Midwife Toad
12 May 1974
E12
Fusion: The Energy Promise
19 May 1974
E13
The Mystery of the Anasazi
26 May 1974