She graduated from high school with Andy and Barney. Her phone number is 247. She is in the town choir and plays the piano. Her fudge brownies are out of sight.

Thelma Lou and Barney like nothing better than sitting on the sofa in Thelma Lou's living room, watching a doctor show on TV and eating a pan of cashew fudge. For Barney, Thelma Lou will always be "the cat's."