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Horizon

BBC TwoDocumentary · 62 seasons

7.5TMDB

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Season 17

E1E1The Ghost Of The Amoco CadizMon, Jan 14 · 60 min
E2E2You Are Old, Father WilliamMon, Jan 21 · 60 min
E3E3Cleared for Take-OffMon, Feb 4 · 60 min
E4E4A Sporting ChanceMon, Feb 11 · 60 min
E5E5The Cancer Detectives of Lin XianMon, Feb 18 · 60 min
E6E6The Big If...Mon, Feb 25 · 60 min
E7E7Cash from TrashMon, Mar 3 · 60 min
E8E8Encounter with JupiterMon, Mar 10 · 60 min
E9E9Portrait of a PoisonMon, Mar 17 · 60 min
E10E10Magnet EarthMon, Mar 24 · 60 min
E11E11Goodbye GutenbergMon, Sep 1 · 60 min
E12E12Invasion of the VirionsMon, Sep 8 · 60 min
E13E13Beyond the Milky WayMon, Sep 15 · 60 min
E14E14Little BoxesMon, Sep 22 · 60 min
E15E15The Other KenyaMon, Sep 29 · 60 min
E16E16Moving StillMon, Oct 6 · 60 min
E17E17The Way OutMon, Oct 13 · 60 min
E18E18The Dead Sea LivesMon, Oct 20 · 60 min
E19E19Once in a Million YearsMon, Oct 27 · 60 min
E20E20Smoker's LuckMon, Nov 3 · 60 min
E21E21Behind the HoroscopeMon, Nov 10 · 60 min
E22E22The Mondragon ExperimentMon, Nov 17 · 60 min
E23E23The SpikeMon, Nov 24 · 60 min
E24E24The SlatemakersMon, Dec 1 · 60 min
E25E25Anatomy of a VolcanoMon, Dec 15 · 60 min

Questions

Where can I watch Horizon?

Horizon streams on PBS.

How many episodes are in Season 17?

Season 17 has 25 episodes.

Episode roomHorizon S17 E12

Horizon · Season 17 · Episode 12

Invasion of the Virions

Monday, September 8 · 60 min

Mark watched

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.

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