When Andy comes to pick up Opie and shakes hands with Sgt. Carter, Gomer remarks how happy he is to see his two favorite people finally meet. But Gomer forgot that Andy and Carter already met on the Andy Griffith show episode where Gomer joins the Marines.
Carter: Did you see that, Pyle? Did you see how close I came to being sent to a Federal penitentiary?
Gomer: Federal penitentiary? I'm sure they wouldn't send you to a penitentiary just for having a little boy in your platoon area.
Carter: Not for that, for murder. I skipped the part about how I killed you first.
Guests Howard and Griffith cross over in their roles from "The Andy Griffith Show."