Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 19 · Episode 5 ·
Notes of a Biology Watcher
Horizon documents how every one of us is owned and operated by other individuals; by hordes of hidden organisms.
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Episode 5 of season 19 of Horizon: “Notes of a Biology Watcher”. Aired 1982-02-08. Watch it online free on ZapFlix.