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Orac steers Liberator off course to investigate a black hole and the Thaarn reach out to Cally from her childhood stories. Liberator lands on the artificial planet Crador.
First Air Date : Jan 02, 1978
Last Air date : Dec 21, 1981
Episode : 52 Episode
Season : 4 Season
Runtime: 50:14 minutes
Studio: BBC One
Country: