The old woman had gray hair tied into a bun with pins in it. She wore glasses and a pink dress.
A Pup Named Scooby-Doo
When Scooby-Doo decided to run away from home after feeling neglected by the gang, Freddie described a hypothetical scenario of what could've been happening to him which started with Scooby getting captured by Mole Men. The old woman rescued him, but she turned out to be Dracula in disguise.