The Giants of Doom - S1.E7

Bizarro comes up with a scheme to use three elements that will let them become giants. Sinestro already has the first element, then he and Sinestro split the moon open to get the second. Superman, Batman, and Robin capture them. The Toyman and Captain Cold launch an attack on the Parthenon to get the third element and Green Lantern stops them (while Aquaman cheerleads). Their capture is all part of the plan: Bizarro needs the SuperFriend computer to assemble the elements and create the giant-creating formula. The four giant-sized villains easily defeat the SuperFriends and Captain Cold freezes them in an ice block and sends them into Saturn's core. Batman's automatic utility belt defroster thaws them out and they escape gas monsters to return to Earth. Returning to Earth, Superman, Batman, Flash, and Green Lantern become giants themselves and thwart the giant-sized Legion villains. Of course, Luthor bails them out at the end and they all escape with the aid of a decoy Legion HQ.