Killer in the Valley Shane : Season 1 Episode 6

While out riding one day, Shane and Marian come upon a sick couple. It's not long before they realize that the couple have contracted a deadly disease. When Marian comes down with the disease, Shane does everything possible to get the quinine they need. He'll do anything - even kill anybody who tries to stand in his way! The drummer that arrives in town decides to make a little profit on the panic that soon erupts.