When Kitty and Matt are talking, there is a bad thunderstorm outside, and later Matt is shown riding in the pouring rain. Yet when Kitty goes outside the Longbranch and runs into the bounty hunter, there's not a sign of rain or thunder and lighning at all.
Festus: "Here's mud in your eye ball!"
This was Jon Voight's third and last appearance on the series. During the year (1969) he appeared in the film, Midnight Cowboy and the following year was nominated for a Best Actor Oscar for it.