Season
- Season 0 1966-12-25
- Season 1 1964-02-04
- Season 2 1965-01-06
- Season 3 1966-01-02
- Season 4 1967-01-17
- Season 5 1968-01-02
- Season 6 1969-01-02
- Season 7 1970-01-05
- Season 8 1971-01-04
- Season 9 1972-01-03
- Season 10 1973-01-04
- Season 11 1974-01-07
- Season 12 1975-01-20
- Season 13 1976-01-05
- Season 14 1977-01-07
- Season 15 1978-01-06
- Season 16 1979-02-26
- Season 17 1980-01-14
- Season 18 1981-01-05
- Season 19 1982-01-11
- Season 20 1983-01-10
- Season 21 1984-01-09
- Season 22 1985-01-07
- Season 23 1986-01-06
- Season 24 1987-01-05
- Season 25 1988-01-04
- Season 26 1989-01-09
- Season 27 1990-01-08
- Season 28 1991-01-07
- Season 29 1992-01-06
- Season 30 1993-01-04
- Season 31 1994-01-10
- Season 32 1995-01-09
- Season 33 1996-01-08
- Season 34 1997-02-27
- Season 35 1998-02-19
- Season 36 1999-01-28
- Season 37 2000-01-12
- Season 38 2001-01-25
- Season 39 2002-01-10
- Season 40 2003-01-09
- Season 41 2004-01-08
- Season 42 2005-01-13
- Season 43 2006-01-12
- Season 44 2007-03-13
- Season 45 2008-01-15
- Season 46 2009-01-26
- Season 47 2009-10-13
- Season 48 2010-09-27
- Season 49 2011-08-08
- Season 50 2012-07-23
- Season 51 2013-08-12
- Season 52 2014-08-18
- Season 53 2016-03-16
- Season 54 2017-01-19
- Season 55 2018-02-05
- Season 56 2019-01-23
- Season 57 2020-01-16
- Season 58 2021-01-04
- Season 59 2022-03-31
- Season 60 2024-07-22
- Season 61 2025-08-18
Season 61 Episode
- Season 0 Episode 1
- Season 0 Episode 2
- Season 0 Episode 3
- Season 0 Episode 4
- Season 0 Episode 5
- Season 0 Episode 6
- Season 0 Episode 7
- Season 0 Episode 8
- Season 0 Episode 9
- Season 0 Episode 10
- Season 0 Episode 11
- Season 0 Episode 12
- Season 0 Episode 13
- Season 0 Episode 14
- Season 0 Episode 15
- Season 0 Episode 16
- Season 0 Episode 17
- Season 0 Episode 18
- Season 0 Episode 19
- Season 0 Episode 20
- Season 0 Episode 21
- Season 0 Episode 22
- Season 0 Episode 23
- Season 0 Episode 24
- Season 0 Episode 25
- Season 0 Episode 26
- Season 0 Episode 27
- Season 0 Episode 28
- Season 0 Episode 29
- Season 0 Episode 30
- Season 0 Episode 31
- Season 0 Episode 32
- Season 0 Episode 33
- Season 0 Episode 34
- Season 0 Episode 35
- Season 0 Episode 36
- Season 0 Episode 37
- Season 0 Episode 38
- Season 0 Episode 39
- Season 0 Episode 40
- Season 0 Episode 41
- Season 0 Episode 42
- Season 0 Episode 43
- Season 0 Episode 44
- Season 0 Episode 45
- Season 0 Episode 46
- Season 0 Episode 47
- Season 0 Episode 48
- Season 0 Episode 49
- Season 0 Episode 50
- Season 0 Episode 51
- Season 0 Episode 52
- Season 0 Episode 53
- Season 0 Episode 54
- Season 0 Episode 55
- Season 0 Episode 56
- Season 0 Episode 57
- Season 0 Episode 58
- Season 0 Episode 59
- Season 0 Episode 60
- Season 0 Episode 61
- Season 0 Episode 62
- Season 0 Episode 63
- Season 0 Episode 64
- Season 0 Episode 65
- Season 0 Episode 66
- Season 0 Episode 67
- Season 0 Episode 68
- Season 0 Episode 69
- Season 0 Episode 70
- Season 0 Episode 71
- Season 0 Episode 72
- Season 0 Episode 73
- Season 0 Episode 74
- Season 0 Episode 75
- Season 0 Episode 76
- Season 0 Episode 77
- Season 0 Episode 78
- Season 0 Episode 79
- Season 0 Episode 80
- Season 0 Episode 81
- Season 0 Episode 100
- Season 0 Episode 101
- Season 0 Episode 102
- Season 0 Episode 103
- Season 0 Episode 104
- Season 0 Episode 105
- Season 0 Episode 106
- Season 0 Episode 107
- Season 0 Episode 108
- Season 0 Episode 109
- Season 0 Episode 110
- Season 0 Episode 111
- Season 0 Episode 112
- Season 0 Episode 113
- Season 0 Episode 114
- Season 0 Episode 115
- Season 0 Episode 116
- Season 0 Episode 117
- Season 0 Episode 118
- Season 0 Episode 119
- Season 0 Episode 120
- Season 0 Episode 121
- Season 0 Episode 122
- Season 0 Episode 123
- Season 0 Episode 124
- Season 0 Episode 125
- Season 0 Episode 126
- Season 0 Episode 127
- Season 0 Episode 128
- Season 0 Episode 129
Horizon - Season 0 Episode 47 Destination Mars
7.40 60 minutes Tantalising new evidence has emerged that life could exist on Mars. But to find out for sure humans will have to journey to this dry, frozen planet.
