The Nature of Things

Season 1

25 Epizods

1960

Season 2

24 Epizods

1962

Season 3

24 Epizods

1963

Season 4

11 Epizods

1964

Season 5

11 Epizods

1965

Season 6

17 Epizods

1965

Season 7

17 Epizods

1966

Season 8

4 Epizods

1967

Season 9

14 Epizods

1968

Season 10

28 Epizods

1969

Season 11

15 Epizods

1970

Season 12

10 Epizods

1971

Season 13

10 Epizods

1972

Season 14

10 Epizods

1973

Season 15

8 Epizods

1974

Season 16

8 Epizods

1975

Season 17

8 Epizods

1976

Season 18

11 Epizods

1977

Season 19

0 Epizods

Season 20

0 Epizods

Season 21

0 Epizods

Season 22

0 Epizods

Season 23

0 Epizods

Season 24

0 Epizods

Season 25

0 Epizods

Season 26

0 Epizods

Season 27

0 Epizods

Season 28

0 Epizods

Season 29

0 Epizods

Season 30

0 Epizods

Season 31

0 Epizods

Season 33

0 Epizods

Season 34

0 Epizods

Season 35

0 Epizods

Season 36

0 Epizods

Season 37

0 Epizods

Season 38

0 Epizods

Season 39

5 Epizods

1998

Season 40

15 Epizods

1999

Season 41

19 Epizods

2000

Season 42

17 Epizods

2001

Season 43

1 Epizod

2002

Season 44

1 Epizod

2003

Season 45

23 Epizods

2004

Season 46

29 Epizods

2005

Season 47

24 Epizods

2007

Season 48

17 Epizods

2008

Season 49

18 Epizods

2009

Season 50

18 Epizods

2010

Season 51

18 Epizods

2011

Season 52

15 Epizods

2012

Season 53

19 Epizods

2013

Season 54

6 Epizods

2014

Season 55

2 Epizods

2015

Season 56

2 Epizods

2016

Season 57

6 Epizods

2017

Season 58

11 Epizods

2018

Season 59

17 Epizods

2019

Season 60

14 Epizods

2020

Season 61

14 Epizods

2021

Season 62

13 Epizods

2023

Season 63

14 Epizods

2024

Season 64

14 Epizods

2025

Season 65

13 Epizods

2025