Season 13 aired between 06 Nov 1972 and 02 Apr 1973, 10 episodes.
Episodes
E01
Vanishing Peoples: Lacandons, The Mayas of Mexico
06 Nov 1972
E02
The Sexes (1)
20 Nov 1972
E03
The Sexes (2)
27 Nov 1972
E04
Acupuncture
04 Dec 1972
E05
Ice Lovers (R)
29 Jan 1973
E06
Think Before You Eat
05 Mar 1973
E07
Stockholm '72: Politics for Survival
12 Mar 1973
E08
Cities for People
19 Mar 1973
E09
Migration: Animals in Cycle
26 Mar 1973
E10
Old Enough
02 Apr 1973