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Mark is somehow linked with a man named Billy, existing in a wild west town, who appears to be his twin. Investigating, Mark arrives in the town and discovers Billy had the same webbing as Mark but has had it removed.
First Air Date : Sep 22, 1977
Last Air date : Jun 06, 1978
Episode : 13 Episode
Season : 1 Season
Runtime: 90:14 minutes
Studio: NBC
Country: United States of America
