The final fight between Matt Dillon and Jude Bonner takes place outdoors on location but almost all the reaction shots of onlookers (including one of director Gunnar Hellstrom in costume as a "dog soldier" were filmed on a sound stage in Los Angeles. Festus also pops up from behind a huge rock that is seen for the first time when he appears (and is not around when the scene cuts away to a group shot).
8 years and 6 days after this episode aired on TV, Geoffrey Lewis and William Smith were both in the Clint Eastwood movie "Any Which Way You Can".