Season 1
Gamu Takayama is a 20 year old member of an organization called Alchemy Stars. After a monster known as C.O.V. attacked the Earth, Gamu falls through a portal of light and meets the giant: Ultraman Gaia, who gives him his powers. Later, when Gaia was in trouble in episode three, another Ultraman, Ultraman Agul appeared. Can they save the Earth? Who is Agul, is he friend or foe? Later in the series it is seen that Agul, too, is a being of justice, but only protects the Earth, not humanity. The conflict between the two later leads to a duel, opening a wormhole that allows a giant beast to reach Earth. What will happen then?
Seize the Light!
After Gamu Takayama briefly encounters the mysterious glowing red giant During some virtual reality experiments. The Root of Destruction begins its first wave of attacks on Earth.
A Hero Appears
His Name is Gaia
Gamu of the Sky
Another Giant
The Ridiculing Eye
The Cleansing of the Earth
The 4,600 Million Years-Old Ghost
Seagull Takes Off
Rock Fight
Dragon Capital
Monster Encircling Net
Night of the Marionettes
The Challenge from the Anti-Space
When the Rain Stops
Birth of Agul
Shadow of Space, Light of Earth
Agul vs. Gaia
Lilia's Maze
The Fossil of Ruin
The Sea of a Mysterious Light
Wings of a Stone
Gamu Expelled!
The Determination of Agul
Showdown for Tomorrow
Final Resolution
A New Battle
The Advent of the Heatwave
The Distant City: Uqbar
The Demon's Cocoon
The Accursed Eye
The Future Seen Before
Battling the Legend
Crash of Souls!
Ransom for a Monster
The Sky of Reunion
The Fourth Symphony of a Nightmare
Ground-Breaking Tusks
Lake of Sadness
I Want to See Gaia!
Resurrection of Agul
Gamu vs. Gamu
The Silver Eyes of Izak
Attack of the Space Monsters
The Living Planet
The Attack of the Forest
X.I.G. Destroyed!?
Revenge of the Death God
An Angel Descends
The Cry of the Earth
Earth is Ultraman's Home