The Justice League of America defends liberty and justice against the Legion of Doom.

A painter's invention can turn his works of art into monsters.

A satellite returns to Earth with a deadly stowaway from space; Batman, Robin and Aquaman aid two scientists trapped by underwater pirates; a carnival witch begins shrinking her customers.

Doctor Droid creates an android powered by the brainwaves of a mouse; the Wonder Twins, Zan and Jayna, attempt to save a pair of teenagers; the Super Friends are captured by an emperor in the underwater kingdom of Oceania.

Drawn into Mxyzptlk's dimension, Batman and Superman must escape; the Wonder Twins and Atom rescue a teen gang from a deadly ride; Apache Chief helps a spirit find his final resting place.