This TV show marks the return of Kevin Conory as Batman and Mark Hamill as The Joker, who have both voiced the characters since all the way back in 1993
Diedrich Bader who voices Booster Gold in this episode previously did the voice of Batman in the series "The Brave and the Bold"
The legendary Carl Reiner voices The Wizard.
The Wizard uses the magic word "Vlarem" to summon his magical powers. It was established in comics lore that when the Wizard was a young man, he was a super-powered hero called The Champion who used the acronym Vlarem to honor elder gods just as the acronym Shazam recognized later gods and heroes.