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Horizon

Season 34 · Episode 7

Turned On by Danger

0.01h 0mApril 17, 1997

Horizon reports on a radical new theory by Professor Polly Matzinger about the human body's immune system.

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Episode 1Psychedelic Science
Episode 2Fat Cats, Thin Mice
Episode 3Shipwreck
Episode 4Genius of the Jet
Episode 5Smallpox on Death Row
Episode 6Silent Children, New Language
Episode 7Turned On by Danger
Episode 8A Perfect Oil Spill
Episode 9The Great Balloon Race
Episode 10Crater of Death
Episode 11Mind Over Body
Episode 12Out of Asia
Episode 13The Virus that Cures
Episode 14The Man Who Lost his Body
Episode 15Dawn of the Clone Age