Ultraman Leo was the 7th show in the Ultra Series. Produced by Tsuburaya Productions, Ultraman Leo was aired between April 12, 1974, and March 28, 1975, with a total of 51 episodes. Tatsumi Nikamoto was the in-suit actor of Ultraman Leo.
Ultraman Leo comes from Nebula L77 (Leo constellation), and takes the human form of Gen Otori. Ultraseven appears to fight a new foe, Alien Magma and his two “pets”, the Red and Black Gillas. Ultimately, Ultraseven is greatly overpowered and his leg is graphically broken by Black Gillas. Ultraman Leo drives off the foes, but Ultraseven is confined to his human form because of his injuries and due to the Ultraeye being damaged when he attempted to transform. Dan then maintains his role as Captain of MAC (Monster Attack Crew). Gen is a gymnastics teacher on the side and joins MAC to defend the Earth. Gen and Dan regularly train together, allowing Ultraman Leo to learn many moves in human form. In episode 34, Dan asks Ultraman Jack to take the Ultraeye back to M78 to be restored while he heals on Earth. However, in Episode 40 MAC is destroyed by Silver Bloom, a saucer monster that belongs to Commander Black. During the attack Dan asks Leo to keep defending the Earth and disappears in the conflagration.
It is later shown that he was taken back to M78 to be fully healed and restored as Ultraseven. Gen is now unemployed and spends most of his time training the kids to defend themselves as well as defending the Earth as Ultraman Leo. Commander Black and alien bunyo captures Gen when he cannot transform completely. Gen as Leo is then dismembered, only to be brought back to life by Ultraman King. Leo would face Black’s final monster, Black End, with the kids he trained, the latter of whom kill Black, and hand the sphere used to control Black End to Leo. Finishing his mission, Gen removes his Leo Ring and sets off to tour Earth, his “second home”.