Ultraman Leo

Earth is once again target for a group of aliens, this time the Magma. This time, however, an Ultra-hero is already on the job: Ultraseven! Unfortunately, these aliens and their monsters Red Gilas and Black Gilas are almost too much for Seven; his leg is seriously injured. Coming on the scene to save him, however, is an Ultra-hero-like being from the Galactic Lion System in constellation L77; he is called Leo. Leo's planet was destroyed by the Magma, and he has followed them to Earth. Leo is given "official" Ultraman status by Ultraseven, who decides to remain on Earth in spite of his injury.

Leo, like his mentor, creates his own human ID, that of Gen Otori. He and Dan Moroboshe (Ultraseven's human form) join the Monster Attack Corps (or MAC for short); Dan, now walking with a cane, is chosen to lead the corps. Because of his injury, Dan rarely changes to Ultraseven, letting Leo do most of the work. (Due to his injury, the Ultra Eye now burns him slightly. Dan does, on occasion, use the Seven Eyes, a similar device, to weaken the Magma monsters to assist Leo.) Gen, like Dan, requires a separate mechanism to change to his Ultra form. This comes in the form of the "Leo ring" (also called the Leo Eyes ring).

During his time on Earth, Leo discovers two other Ultra-beings. One is his twin brother Astra, who stays near enough to Earth to assist Seven and Leo in their fight. More important was Leo's discovery that a legendary immortal Ultra-being, Ultraman King, is more than just legend, but real. Thankfully, King comes to save Leo and Astra from a Magma trap. During the course of this series, the other Ultra-heroes introduced to date also guest-star.

Leo's main beam attack is his Hand Beam, emitted from devices on his wrist. Leo can also attack with a blue laser-like beam emitted from his ColorTimer, but only while it glows blue. After he and Astra are rescued by Ultraman King, Leo receives the Ultra Cape, another powerful multi-function weapon. (This cape was also called the Multi-Purpose Mantle.) Leo and Astra together can shoot a devastating red lightning-like bolt from their joined hands.

In one episode, Leo fights a monster named Ron. Turns out Ron was Leo's pet on L77, before it was destroyed. Rather than destroying the pet-turned-against-master, Leo somehow causes Ron to merge with himself.

In the final battle with the Magma, the entire MAC is killed (although not Dan/Ultraseven; he "abandons" MAC - to become Ultraseven - prior to this incident). Leo fights on with both hope and fury, eventually defeating the Magma Commander Black. He then retires to space.