Trick or Threat

Cain the Caretaker tells the audience a Halloween tale about the House of Mystery where Batman, Zatanna, Constantine, and Doctor Fate are all turned back into 10-year-olds, with very little memory of who they really are, by Klarion the Witch Boy. After falling for Klarion's trap and regaining their memories, the 10-year-old Justice Leaguers must fight Klarion the Witch Boy even when he unleashes vampires, a werewolf, a monster that resembles Frankenstein's monster, a pumpkin-headed creature, and some small demons on them. They must also find a way to defeat Klarion when he gets his hands on the Helmet of Fate, turn themselves back to normal, and escape the House of Mystery before it disappears by midnight.

Where to watch

Justice League Action on JustWatch ↗

Still and episode from TVmaze.