When Dennis Weaver's character, Chester, Left the show there was no more mention of him. Until here. At the end of the show, Festus, Matt, and Doc are walking down the street. Festus is talking about making pants out of chaps so that you would have your chaps on all the time. Doc says that he's heard that idea before, from another Pinhead. Which is a reference to Chester, who early in the series was trying to sew chaps together to make pants out of them.