William Christopher with his strained voice is superbly cast as Dr Peterson. As he was also as iRS Agt. Heathcote. The epitome of a laid-back character actor. Rare allying of Floyd (Howard McNear) & Clara (Hope Summers) after funny both cutting each other off going on about their infirmities. Floyd gets in a good jab about Clara's bursitis complaining now running 25 years.
We see Andy genuinely worried about Opie's heath. He usually is under control. Helen is very aggressive in her pointing Andy in the right direction. Best scene is at the Taylor's dinner table. Floyd & Clara throw digs at the Dr and give comical reactions to the Dr's merits being explained by he and the rest. Funniest bit is Dr Petersen awkwardly all thumbs carving a turkey with Floyd's dismay, and comments of shock after the Dr leaves. Also funny when Andy tries to pin Aunt Bee's worry as motivating his concern. A very funny, but touching episode.