This is the first episode of many in which Deputy Fife accidentally discharges his duty revolver, causing Andy to confiscate Barney's bullets.
At the end of this episode, Andy asks Capt. Barker to send him a magnetic map like the one used by the state police. Barker apparently made good on the promise because such a magnetic map is later seen in the episode entitled "Mayberry on Record."
Andy mentions that he and Barney are cousins in the comment, "I never did think my own cousin could make such a good deputy," right after Barney tells him something "big" is happening.
This is the first time Myer's Lake is seen in the series. It is actually Franklin Canyon Reservoir, located between Coldwater Canyon Dr. and Benedict Canyon Dr. in Beverly Hills.