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Horizon

Season 7 · Episode 22

Crown of Thorns

0.01h 0mAugust 31, 1970

The population explosion of the Crown of Thorns starfish is investigated by Horizon.

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Episode 1Just Another World
Episode 2Henry Royce, Mechanic
Episode 3A Disease of Our Time - Stress
Episode 4A Disease of Our Time - Heart Attacks
Episode 5Sex and Sexuality
Episode 6Whose Coast?
Episode 7A Much Wanted Child
Episode 8The Expert Witness
Episode 9After the Iron Age
Episode 10Let the Therapy Fit the Crime
Episode 11The World Outside
Episode 12In the Beginning was the Word
Episode 13The Drifting of the Continents
Episode 14A Case of Priority
Episode 15The Fretful Elements
Episode 16One Man's Meat
Episode 17Only Skin Deep
Episode 18Wolves and Wolfmen
Episode 19A Measure of Uncertainty
Episode 20The Manhunters
Episode 21Don't Get Sick in America
Episode 22Crown of Thorns
Episode 23Noah's Ark in Kensington
Episode 24Virus
Episode 25Water, Water
Episode 26All Creatures Great and Small
Episode 27A Child for a Lifetime
Episode 28Something for Our Children
Episode 29Million Ton Tanker
Episode 30The Insect War
Episode 31The Savage Mind
Episode 32Tanks
Episode 33Mind the Machine
Episode 34Square Pegs
Episode 35Earthquakes, The City that Waits to Die
Episode 36The Man who Talks to Frogs
Episode 37The Gargantuan Triumph of Science