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The crew search for a new home base on the planet Obsidian, whose volcanic outbursts -- and a nuclear device buried in the planet's core by its inhabitants -- protect the planet from being overtaken. Servalan employs an elaborate plan to take control of the Liberator.
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:
