This episode starts out with Aunt Bee feeling depressed about an acquaintance who passed away and was close to Aunt Bee in age. Andy suggests a visit to the doctor but she dismisses the idea saying that Doc Andrews wouldn't understand. On her way home, she encounters a street peddler who is pushing a special tonic that is supposed to give you a boost and revitalize your energy. Aunt Bee buys a couple bottles and also invites the charismatic pitchman over for dinner. Later, Andy and Barney also encounter the "medicine man" and they both become immediately suspicious. However, he has the necessary paperwork for street peddling and they leave him alone for the time being. In the meantime, Aunt Bee is home cooking dinner and has already sampled the tonic. When Andy and Barney get to the house, they fine Aunt Bee bouncing up and down playing the piano and singing with Opie. They immediately notice her erratic behavior (Barney tells Andy "I think she's tiddly") They then find the tonic bottles and decide Barney should take one of them to the local doctor for analysis. By this time Colonel Harvey arrives for dinner. Aunt Bee and Opie are charmed by his talk and magic tricks however Andy already has him figured out as a boorish and pompous double talker. Veteran character actor John Dehner is flawless in the role as Aunt Bee's medicine man. Frances Bavier turns in another great performance as Aunt Bee while under the influence of the Colonel's Charm and his tonic. Director Bob Sweeney also deserves props for how he framed each scene in this episode to emphasize the visual humor ( e.g. Aunt Bee bouncing up and down on the piano stool and spinning around to greet Andy and Barney. Also, the Colonels entrance to the Taylor house when he discovers Andy is Aunt Bee's nephew.) Its also good to see Andy and Barney working together as a team without Barney doing something inept. Another good example of TAGS in its prime.