|Don (Peggy's friend)|
|First Episode||Barney Mends a Broken Heart|
|Last Episode||Barney Mends a Broken Heart|
|Portrayed by||Fred Beir|
Don was an old classmate of Peggy McMillan's who was passing through Mayberry and staying with her while in town. His friendship with Peggy made Andy jealous.
Don and Peggy hadn't seen one another in nearly 3 years. They were classmates who once shared a lab table in chemistry. Peggy bragged that Don was a straight A student. Don became a pharmacist and was traveling to Miami for a convention, when he stopped by Mayberry to say hello.
He was portrayed by Fred Beir.