[3] After a brief appearance in issue #26, the mastermind Mister Mind is eventually revealed in Captain Marvel Adventures #27 to be a cartoonish alien worm with spectacles and a talkbox around his neck to amplify his voice.

[4] "The Monster Society of Evil" serial concluded with Captain Marvel Adventures #46 (1945), in which Mind is finally captured, tried, and executed.

Individual chapters would later be reprinted, after the Captain Marvel characters were acquired from Fawcett by DC Comics in 1972, in various collections under the trademark Shazam!

In 1989, American Nostalgia Library reprinted the serial as The Monster Society of Evil – Deluxe Limited Collector's Edition.

He gathered known villains like Dummy, Mister Who, Nyola, Oom the Mighty, and Ramulus to make up the Monster Society of Evil.

[6] When Mister Mind was transported to Earth-S, recruited supervillains, armies, and entire alien species to aid him in his attempt to conquer the Earth, and first relayed his information from the planetoid Punkus via radio.

He began his reign of terror on Earth in 1943, boasting that he and the Monster Society of Evil would give Captain Marvel "nightmares from now on".

Finally, a desperate Mister Mind attacked Captain Marvel's alter ego Billy Batson with ether and left him unconscious.

Mister Mind's alien physiology proved resistant to the high voltage, and he entered a state of suspended animation that was mistaken for death.

ongoing series in the 1990s, when Mister Mind and the Monster Society of Evil were re-introduced in Post-Crisis continuity, DC Comics had done a similar thing as readers could mail away for a decoder card for the "Venusian Language" and read the secret messages.