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Horizon

BBC TwoDocumentary · 62 seasons

7.5TMDB

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Season 4

Questions

Where can I watch Horizon?

Horizon streams on PBS.

How many episodes are in Season 4?

Season 4 has 23 episodes.

Episode roomHorizon S4 E15

Horizon · Season 4 · Episode 15

The War of the Boffins

Tuesday, September 12 · 60 min

During the human struggles between the British and German air forces ... another conflict was going on step by step, month by month. This was a secret war whose battles were lost or won unknown to the public: and only with difficulty is it comprehended even now by those outside the smalt high scientific circles concerned.

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