Investigates various virus infections ranging from smallpox and rabies down to influenza and the common cold. The way they function and the reasons the body builds up resistance to some and not to others.
| Title | Horizon - Season 17 Episode 12 : Invasion of the Virions |
|---|---|
| Alternative Titles | BBC Horizon |
| Subtitle Available |
 ETC.
|
| First Air Date | 1964-02-04 |
| Last Air Date | 2025-10-06 |
| Number of Episodes | 1173 |
| Number of Seasons | 61 |
| Genres | Documentary, |
| Networks | BBC Two, |
| Casts | |
| Plot Keywords | , |
Episodes List
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Horizon Season 17 :Episode 1 The Ghost Of The Amoco Cadiz The Ghost Of The Amoco Cadiz
1980-01-14Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 2 You Are Old, Father William You Are Old, Father William
1980-01-21Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 3 Cleared for Take-Off Cleared for Take-Off
1980-02-04Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 4 A Sporting Chance A Sporting Chance
1980-02-11Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 5 The Cancer Detectives of Lin Xian The Cancer Detectives of Lin Xian
1980-02-18Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 6 The Big If... The Big If...
1980-02-25Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 7 Cash from Trash Cash from Trash
1980-03-03Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 8 Encounter with Jupiter Encounter with Jupiter
1980-03-10Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 9 Portrait of a Poison Portrait of a Poison
1980-03-17Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 10 Magnet Earth Magnet Earth
1980-03-24Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 11 Goodbye Gutenberg Goodbye Gutenberg
1980-09-01Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 12 Invasion of the Virions Invasion of the Virions
1980-09-08Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 13 Beyond the Milky Way Beyond the Milky Way
1980-09-15Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 14 Little Boxes Little Boxes
1980-09-22Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 15 The Other Kenya The Other Kenya
1980-09-29Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 16 Moving Still Moving Still
1980-10-06Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 17 The Way Out The Way Out
1980-10-13Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 18 The Dead Sea Lives The Dead Sea Lives
1980-10-20Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 19 Once in a Million Years Once in a Million Years
1980-10-27Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 20 Smoker's Luck Smoker's Luck
1980-11-03Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 21 Behind the Horoscope Behind the Horoscope
1980-11-10Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 22 The Mondragon Experiment The Mondragon Experiment
1980-11-17Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 23 The Spike The Spike
1980-11-24Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 24 The Slatemakers The Slatemakers
1980-12-01Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
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Horizon Season 17 :Episode 25 Anatomy of a Volcano Anatomy of a Volcano
1980-12-15Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
