The Serpent Lady is a criminal who was captured and arrested by Blue Falcon and Dynomutt, and ten years later, she escaped from prison and attempted to exact her revenge on the duo. She donned an iron mask and referred to herself simply as Ironface, and she captured all of the people responsible for her arrest: the District Attorney, the Warden of Rockatraz, Detective Malloy, Mayor Gaunt, Judge Grater, Chief of Police Grisby, the Chief Prosecutor, and of course, Blue Falcon and Dynomutt. The villainess brought the group to her lair, where they disappeared one by one, with the help of her unnamed henchmen. After Blue Falcon and Dynomutt take down Ironface's henchmen, the pair captured Ironface and removed the mask, revealing Ironface as The Serpent Lady. Her plans for revenge foiled, the Serpent Lady snarls at the duo before she is arrested once again.
- The episode actually aired as part of The Scooby-Doo/Dynomutt Hour.