Horizon Season 7 Episode 22
Episode Title: Crown of Thorns
Genre:
Documentary
Countries:
UK,
Airing Date: August 31, 1970
Runtime:50 mins
IMDb Rating:
Watch Horizon Season 7 Episode 22 full movie online free in HD with English subtitles – no download needed.
Horizon: The population explosion of the Crown of Thorns starfish is investigated by Horizon.