Ben Weaver is played by Tol Avery. The first actor to play Ben Weaver before his passing was veteran actor Will Wright.
This is the first time Barney is seen retrieving his bullet from his right shirt pocket. It's typically in his left.
Don Knotts was a ventriloquist, a skill he displayed a little in this episode when he posed as a mannequin and spoke with Sheriff Taylor.
Ben Weaver is wearing the same tie in this episode that Gomer bought to go on a date with Mary Grace Gossage in the episode, "A Date for Gomer." Although both episodes were in black and white, Andy describes it as a purple tie with acorns. It's visible in the scene, inside the store, when Ben is talking to Andy by the cash register.
Ben Weaver tells Barney that the can/bottle opener he's holding is priced at a dollar and a quarter. That would be the equivalent of approximately $12 in 2015.