Saturday Morning's Forgotten Heroes: Dynomutt vs. Madame Ape-Face (1977)
Dynomutt (Frank Welker) and Blue Falcon (Gary Owens) have their hands full with a vain villain, "Madame Ape-Face". Her M. O. (Method of Operation) would be copied in Nickelodeon's Are You Afraid of the Dark several years later.
Now, doesn't the design of the Big City Center Theatre look familiar? It sure does. Y'think maybe some of the staff were stumping for a crossover with the Super Friends?