I've again read the reviews and feel comfortable with my "6". No one could replace Don Knotts or the chemistry between him and Andy. However, it might be that the actors needed a fresh face to work with, and Jerry was clearly a good guy, with comedic sense and talent, shown in the scene where he pulls the entire tablecloth off just stepping into the kitchen, or his "stealing" a rifle from the case and trying to handle it like a professional. If the writers could have cut back on that word-forgetting bit, he would have been a lot less annoying. And in time he would have worked well. But it sounds like it was his decision to go with "My Mother the Car". And we were the losers in that deal.