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A large planetoid is on a direct collision course with earth. The Sentinels come to the conclusion that the planetoid must be destroyed to save the earth, so using their spaceship, they intercept the planetoid and find out that further investigation is needed.
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:
