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Horizon

BBC TwoDocumentary · 62 seasons

7.5TMDB

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Season 30

Questions

Where can I watch Horizon?

Horizon streams on PBS.

How many episodes are in Season 30?

Season 30 has 21 episodes.

Episode roomHorizon S30 E19

Horizon · Season 30 · Episode 19

A Vital Poison

Monday, June 14 · 60 min

Horizon describes how researchers discovered that a lethal gas, called nitric oxide, was behind some of the most basic functions of our bodies.

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