From Super Friends: The Legendary Super Powers Show:
It's bad enough that Lex Luthor (Stan Jones) was embarrassed when, after shrinking Robin, Firestorm, & the Wonder Twins, they turned the tables on him, now he has to deal with a neophyte who yearns to join the Super Friends.
Captain Mystery is a well-meaning fanboy whose bumbling enables the 1-shot villain Robber Baron to escape from Batman & Robin (Adam West & Casey Kasem). He then tries to get Firestorm to help him track the Baron, but is unaware that Luthor has drawn a bead on him.
Edit, 7/26/18: Dailymotion deleted the video. Soon as we find another copy, we'll bring it back.
In hindsight, if he were given a choice, I would think Luthor would consider retiring after this one.........