Dan Tullis Jr. appears in 23 episodes of this series - except for the first two appearances, 20 of those appearances are either explicitly as "Police Officer Dan" or as an unnamed Policeman which is presumably still "Police Officer Dan." But in this episode, he just suddenly appears as an F.B.I. agent instead before returning to being a policeman. (And his first appearance was as "Sheriff", also a policeman.)
This episode was taped on January 31, 1992.