Season
- Season 0 1982-09-06
- Season 1 1958-10-16
- Season 2 1965-09-20
- Season 3 1966-09-19
- Season 4 1967-09-25
- Season 5 1968-09-23
- Season 6 1969-09-15
- Season 7 1970-09-15
- Season 8 1971-09-13
- Season 9 1972-09-11
- Season 10 1973-09-10
- Season 11 1974-09-09
- Season 12 1975-09-08
- Season 13 1976-09-13
- Season 14 1977-09-12
- Season 15 1978-09-11
- Season 16 1979-09-10
- Season 17 1980-09-08
- Season 18 1981-09-14
- Season 19 1982-09-13
- Season 20 1983-09-12
- Season 21 1984-09-10
- Season 22 1970-01-01
- Season 23 1970-01-01
- Season 24 1970-01-01
- Season 25 1970-01-01
- Season 26 1970-01-01
- Season 27 1970-01-01
- Season 28 1970-01-01
- Season 29 1970-01-01
- Season 30 1970-01-01
- Season 31 1970-01-01
- Season 32 1970-01-01
- Season 33 1970-01-01
- Season 34 1970-01-01
- Season 35 1991-09-09
- Season 36 1970-01-01
- Season 37 1970-01-01
- Season 38 1970-01-01
- Season 39 1970-01-01
- Season 40 1970-01-01
- Season 41 1970-01-01
- Season 42 1970-01-01
- Season 43 1970-01-01
- Season 44 1970-01-01
- Season 45 1970-01-01
- Season 46 1970-01-01
- Season 47 1970-01-01
- Season 48 1970-01-01
- Season 49 1970-01-01
- Season 50 1970-01-01
- Season 51 1970-01-01
- Season 52 1970-01-01
- Season 53 1970-01-01
- Season 54 1970-01-01
- Season 55 1970-01-01
- Season 56 1970-01-01
- Season 57 1970-01-01
- Season 58 1970-01-01
- Season 59 1970-01-01
- Season 60 2018-01-04
- Season 61 1970-01-01
- Season 62 1970-01-01
- Season 63 1970-01-01
- Season 64 1970-01-01
- Season 65 1970-01-01
- Season 66 1970-01-01
- Season 67 1970-01-01
- Season 68 2025-09-05
Season 68 Episode
- Season 18 Episode 1
- Season 18 Episode 2
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- Season 18 Episode 4
- Season 18 Episode 5
- Season 18 Episode 6
- Season 18 Episode 7
- Season 18 Episode 8
- Season 18 Episode 9
- Season 18 Episode 10
- Season 18 Episode 11
- Season 18 Episode 12
- Season 18 Episode 13
- Season 18 Episode 14
- Season 18 Episode 15
- Season 18 Episode 16
- Season 18 Episode 17
- Season 18 Episode 18
- Season 18 Episode 19
- Season 18 Episode 20
- Season 18 Episode 21
- Season 18 Episode 22
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- Season 18 Episode 24
- Season 18 Episode 25
- Season 18 Episode 26
- Season 18 Episode 27
- Season 18 Episode 28
- Season 18 Episode 29
- Season 18 Episode 30
- Season 18 Episode 31
- Season 18 Episode 32
- Season 18 Episode 33
- Season 18 Episode 34
- Season 18 Episode 35
- Season 18 Episode 36
- Season 18 Episode 37
- Season 18 Episode 38
- Season 18 Episode 39
- Season 18 Episode 40
- Season 18 Episode 41
- Season 18 Episode 42
- Season 18 Episode 43
- Season 18 Episode 44
- Season 18 Episode 45
- Season 18 Episode 46
- Season 18 Episode 47
- Season 18 Episode 48
- Season 18 Episode 49
- Season 18 Episode 50
- Season 18 Episode 51
- Season 18 Episode 52
- Season 18 Episode 53
- Season 18 Episode 54
- Season 18 Episode 55
- Season 18 Episode 56
- Season 18 Episode 57
- Season 18 Episode 58
- Season 18 Episode 59
- Season 18 Episode 60
- Season 18 Episode 61
- Season 18 Episode 62
- Season 18 Episode 63
- Season 18 Episode 64
- Season 18 Episode 65
- Season 18 Episode 66
- Season 18 Episode 67
- Season 18 Episode 68
- Season 18 Episode 69
- Season 18 Episode 70
- Season 18 Episode 71
- Season 18 Episode 72
- Season 18 Episode 73
- Season 18 Episode 74
- Season 18 Episode 75
- Season 18 Episode 76
- Season 18 Episode 77
- Season 18 Episode 78
- Season 18 Episode 79
Blue Peter - Season 18 Episode 72
7.60 25 minutes During the last 30 years more natural woodland has been lost in Britain than in the past four centuries. Find out today how you can help, and see the incredible 260-million-year-old tree discovered a thousand feet below ground at Six Bells Colliery, Gwent.
