Super Friends (1973) : 7x4

Revenge of Doom: Batman and Robin foil some building constructors' plans to revive a destroyed Hall of Doom and turn it into a Museum. When Batman figures something is wrong, the building constructors reveal themselves to be Lex Luthor, Soloman Grundy, Sinestro and the rest of the Legion of Doom. A Pint of Life: The Wonder Twins and Aquaman search the Amazon River for Doctor Marks who's on an expedition. The doctor's son needs a blood transfusion and there's only a moment of hours left for the Super Friends to locate the doctor. Day of the Dinosaurs: The Hall of Justice, with Wonder Woman and Samurai inside, gets swallowed up into the Earth. After tumbling through layers of rock, the Hall of Justices comes to a stop at a strange forgotten world beneath our own. When Wonder Woman and Samurai explore the strange subterranean world, they are attacked by prehistoric creatures called Slarums. Technos saves the two Super Friends and offers to show them the world of the Volti.