Don Dula is a dastardly dude who appears in a Sesame Street parody of Dragnet. (EKA: Episode 3499)

When Darlene's DOG's letter D goes missing (making it an OG), D-tective Dave is sent on the case. He finds Don on the docks and spots the D behind his back. Don admits he needed a D, saying he doesn't have a dime to his name (his word "dime" lacks a D). Dave gives him his extra D.