The clips showing the origin of Lex Luthor is lifted straight from the Adventure Comics #271 (April 1960) story, "How Luthor Met Superboy."
Villians appearing without dialogue are Brainiac, Riddler, Scarecrow, and Solomon Grundy.
Although all of the SuperFriends appear in this episode, Aquaman, Flash, Hawkman, Black Vulcan, and Samurai have no dialogue.
Features clips from "The Giants of Doom" and "Revenge on Gorilla City."
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