Mrs. Hudson was supposedly the cook of Dorian Wormwood, the retired stage actor. Actually, she was Wormwood in disguise.
She has gray hair and wears a chef's cap.
She seems to have a strong dislike for Ronald Adair, and accuses him of the murder.
Scooby-Doo, Where Are You? (DC Comics)
The fact that the name "Mrs. Hudson" is the same as the landlady of Sherlock Holmes is no coincidence. All the names were picked for associations with Holmes, as clues.