Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 9 · Episode 1 ·
The Missing Link
In this episode of Horizon, you find out how feasible it is to build a 35 mile long tunnel between Britain and France.
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Episode 1 of season 9 of Horizon: “The Missing Link”. Aired 1972-01-03. Watch it online free on ZapFlix.