Ultraman Gaia is a Japanese tokusatsu TV show and is the 13th show in the Ultra Series. Created by Chiaki J. Konaka and produced by Tsuburaya Productions and Mainichi Broadcasting System, Ultraman Gaia was aired on JNN TV stations from September 5, 1998 until August 28, 1999, with a total of 51 episodes.
Ultraman Leo is an Ultra foreign to the Land of Light, instead hailing from the fallen Planet L77 of the Leo constellation, where he and his brother Astra were royalty. After his planet was destroyed by Alien Magma and his twin Giras kaiju, Leo traveled to Earth, intending to make it a second home. While there, he blended into human society as Gen Ohtori, and became a gym instructor at a fitness club for children. But, when the Alien Magma that destroyed L77 came to conquer Earth, he was forced to take action. Leo met Ultraseven during his initial fight against Alien Magma, and became the first Ultra Crusader of Earth to not hail from the Land of Light. Unlike most of the previous Ultras to visit Earth, Leo's fighting style specializes in martial arts giving him far greater physical abilities than any other known Ultras. Despite his foreign origins, he, along with Astra, were readily accepted into the pantheon of the Ultra Brothers. During his tenure on Earth, Leo and Seven became very close, and it was for this reason that Seven would eventually entrust the training of his son Ultraman Zero to Leo and Astra.
本作是自前作《超人高斯》完結兩年後推出的電視劇系列。該系列旨在擴大受眾年齡層，採用完全連續劇形式展開劇情，採用大河劇式的系列結構，並引入了許多新的設定，例如多個變身者的出現等。廣告代理商從之前的JR東日本企畫改為電通，節目製作局則從之前的每日放送改為CBC。這是圓谷製作公司首次擔任該系列的製作，同時該系列也首次選定於早晨播出。
A young man becomes the giant hero Ultraman Orb, a warrior of light, to battle monsters and aliens threatening Earth using the powers of his many predecessor guardians.
In a fight between two giant monsters named Takkong and Zazahn, young race car driver Hideki Go is killed while trying to rescue a little boy and a dog from the falling rubble. His valiant sacrifice is noted by everyone, even his friends and the new defense force MAT, but an unseen being also takes notice. Looking over Go is the "New Ultraman", who is so touched by Go's actions that he decides to combine his life force with that of Hideki, thus bringing him back to life. Hideki Go then joins the MAT and fights alongside them and Ultraman against monsters and alien invaders.
Hayata is a member of the Science Patrol, an organization tasked with investigating bizarre anomalies. He is mortally wounded when accidently encountering an alien being from Land of Light, who grants Hayata new life as the two are merged into one. Now, whenever a threat arises that is too great for the Science Patrol to handle, Hayata activates the beta capsule and becomes the hero known as Ultraman.
As humanity begins migrating beyond Earth, a new Ultraman named Dyna arrives and bonds with defense organization GUTS' newest recruit, Shin Asuka, to protect a colony on Mars.
Two siblings - an idealistic teenage boy and his naïve younger sister - are forced to pilot an abandoned Jaeger across a hostile landscape in a desperate attempt to find their missing parents.
Young Kengo Manaka lives on Mars. As he lives out his peaceful, day-to-day life, the monster Golba suddenly appears, throwing the town into chaos! Meanwhile, Kengo has a fateful meeting with a giant stone statue sleeping deep beneath the ground on Mars. When Kengo becomes one with an Ultra-Ancient light, his destiny is forcefully thrown into motion!
故事的發生地是在一座名為星元市的小城市。在市內的獅子尾山上，聳立著一個閃耀著彩色光芒的巨大物體，這個被命名為“摩諾之角”的物體，實際上是16年前“怪獸之日”事件發生之後就矗立在那里的“怪獸的角”。在世界各地同時出現怪獸的“怪獸之日”事件發生之後，怪獸災害開始變得日常。日本的地球防衛隊開始以武力對付怪獸的同時，怪獸防災科學調查所（統稱SKIP/Scientific Kaiju Investigation and Prevention center）也為了防止怪獸災害的發生和受災情況擴大，不斷對各地區進行科學調查和避難引導。這個組織時至今日，還在不停地調查“怪獸之日”出現的原因和城市中的“摩諾之角”。年僅7歲的“優馬”在獅子尾山與父母露營時，遭遇了怪獸襲擊，他奇跡般地生還並毫發無傷。以此為契機，“優馬”踏上了研究怪獸生物學的道路。雖然有著痛苦的過去，但優馬沒有失去夢想，他依靠“想象的力量”成長起來，作為新手調查員加入了“SKIP”，被分配到了星元市分所。就在這時，星元市發生了大規模的怪獸災害。“想要保護眼前這些窮途末路的人們！”這個強烈而直接的想法從心底湧出的瞬間，“優馬”的腦海中出現了兒時見過的光之使者“盧提昂”在和他說話：“我就是你，你就是我... ... 釋放你的想象力！”出現在手中的神秘之光包裹住優馬的身體，釋放出的想象之力將光與人結合在一起，守護未來的光之巨人“超人Arc”變身！優馬以及超人Arc與重要的夥伴一起，追逐著永不停歇的夢想，從現在開始奔跑！
Yapool, an ancient interdimensional race of beings tries to conquer the Planet Earth with his army of monsters, called Terrible-Monsters. The newest member of the Ultra Brothers, Ultraman Ace, arrives on Earth to aid humanity in the battle against Yapool. Touched by the sacrifices of Seiji Hokuto and Yuko Minami, he revives them and grants them the Ultra Rings, which allows them to transform into Ultraman Ace in times of need.
在超人托利加與闇之巨人、邪惡托利加的戰鬥已經過去了七年，世界進入了技術向宇宙推進飛速發展的「新前線時代」，人類的目光進一步轉向宇宙開發，而怪獸災害的對策規模傾向縮小。
正當人類進入和平時代之時，突然飛來的神秘宇宙浮遊物體「索菲亞」開始襲擊地球和火星殖民地，導致人類與宇宙的聯繫被斷絕，成為了「孤島般的星球」。
主角「明日見奏大」的日常生活也被這魔手迫近，在眼前不停發生破壞，終於現身的巨大怪獸，奏大不顧危險，跳向面前敵人之時，卻意外變身成了全新的巨人「超人帝卡」。
Dr. Gulliver has returned from his journey to his family after a long absence - and tells them the story of his travels.
前 WWE 摔角手 Big Show 退出擂台，準備迎接更艱鉅的挑戰：在佛羅里達與妻子一同養育三個女兒。
Wealthy developer Jack Robinson is stunned when a gigantic human skeleton is discovered on his building site. According to a mysterious woman, it is part of a curse that has dogged his family for years. To lift the jinx placed upon him, Jack will need to visit the land in the sky - by climbing up a very tall beanstalk.
Follow veteran warriors Ax Battler, Tyris Flare, and Gilius Thunderhead as they once again battle to save Yuria from the evil giant Death Adder who just won’t seem to stay dead. Fortunately, this time they have the inexperienced and underprepared Hampton Squib on their side.
Brothers Jim and Bill Vieira search for giant skeletons after researching tales of giants being sighted along with old accounts of giant bones being uncovered across the country.
