Patricia Stevens's last regular voicing of Velma on the show. She would be replaced by Marla Frumkin for the remainder of the season, but would return for the special Scooby Goes Hollywood (1979) which ironically aired during the period when Frumkin's episodes were airing, creating an inconsistency in voice casting.

A rare occasion when the villain is unmasked by Scrappy, rather than by one of the gang.