Season 15 aired between 09 Oct 1974 and 18 Dec 1974, 8 episodes.
Episodes
E01
And God Created Great Whales
09 Oct 1974
E02
Children's Hospital
23 Oct 1974
E03
The Heimaey Eruption: Iceland 1973
30 Oct 1974
E04
Traveller From an Antique Land
06 Nov 1974
E05
Mind and Hand
20 Nov 1974
E06
Frogs, Snakes and Turtles
04 Dec 1974
E07
Discovery on Charlton Island
11 Dec 1974
E08
The First Inch
18 Dec 1974