The Texan Season 1 Episode 25 A Race for Life

A crooked gambler with a Kentucky-born thoroughbred prods a drunken rancher into betting his entire spread and all the money he has in the bank on a horse race. The gambler tries to incapacitate the rancher's entry in the race but fails; however, what his henchmen couldn't accomplish a rattlesnake bite could and the horse comes up lame racing to fetch the doctor. Longley agrees to allow his quarter-horse to enter the race instead.