Shoot Out At Lands End Man from Atlantis : Season 1 Episode 6
NBC 1h 00m int(0)
Aired: October 13th, 1977 @ 8:00 PM EST on NBC
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.