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Horizon is a mysterious planet which neither Zen nor Orac can shed any light on. After teleporting down the crew are captured by Federation guards. Avon considers leaving the planet by himself with 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: