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When an alien plant spore is brought to Earth by a returing space probe, it endangers the planet when it begins to grow uncontrollably. The Sentinels must consult a wise cosmic sage before deciding on a course of action.
First Air Date : Sep 10, 1977
Last Air date : Dec 03, 1977
Episode : 13 Episode
Season : 1 Season
Runtime: 22:30 minutes
Studio: NBC
Country: