Bonanza - Season 7 - The Lonely Runner (Episode 5)
Plot: A judge awards itinerant horse breeder Jim Acton's beloved mare to rancher Sam Whipple. Jim tries to buy her back, but Whipple refuses his offer, after which a fight ensues and Jim kills Whipple in self-defense
Episode Aired On:
Sunday, October 10 1965 59 years ago