National Geographic Specials

Season 1

3 episodes · 1965

Season 2

2 episodes · 2002

Season 3

4 episodes · 1967

Season 4

5 episodes · 1968

Season 5

4 episodes · 1969

Season 6

3 episodes · 1970

Season 7

3 episodes · 1971

Season 8

3 episodes · 1972

Season 9

4 episodes · 1973

Season 10

3 episodes · 1974

Season 11

2 episodes · 1975

Season 12

3 episodes · 1976

Season 13

4 episodes · 1977

Season 14

3 episodes · 1978

Season 15

4 episodes · 1979

Season 16

5 episodes · 1980

Season 17

4 episodes · 1981

Season 18

4 episodes · 1982

Season 19

4 episodes · 1983

Season 20

4 episodes · 1984

Season 21

6 episodes · 1985

Season 22

6 episodes · 1986

Season 23

4 episodes · 1987

Season 24

8 episodes · 1988

Season 25

6 episodes · 1989

Season 26

5 episodes · 1990

Season 27

5 episodes · 1991

Season 28

5 episodes · 1992

Season 29

4 episodes · 1993

Season 30

5 episodes · 1994

Season 31

5 episodes · 1995

Season 32

10 episodes · 1996

Season 33

6 episodes · 1997

Season 34

9 episodes · 1998

Season 35

9 episodes · 1999

Season 45

1 episode · 2010