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?

1

E1 · Seize the Light!

Sep 5, 1998

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.

2

E2 · A Hero Appears

Sep 12, 1998

3

E3 · His Name is Gaia

Sep 19, 1998

4

E4 · Gamu of the Sky

Sep 26, 1998

5

E5 · Another Giant

Oct 3, 1998

6

E6 · The Ridiculing Eye

Oct 10, 1998

7

E7 · The Cleansing of the Earth

Oct 17, 1998

8

E8 · The 4,600 Million Years-Old Ghost

Oct 24, 1998

9

E9 · Seagull Takes Off

Oct 31, 1998

10

E10 · Rock Fight

Nov 7, 1998

11

E11 · Dragon Capital

Nov 14, 1998

12

E12 · Monster Encircling Net

Nov 21, 1998

13

E13 · Night of the Marionettes

Nov 28, 1998

14

E14 · The Challenge from the Anti-Space

Dec 5, 1998

15

E15 · When the Rain Stops

Dec 12, 1998

16

E16 · Birth of Agul

Dec 19, 1998

17

E17 · Shadow of Space, Light of Earth

Dec 26, 1998

18

E18 · Agul vs. Gaia

Jan 9, 1999

19

E19 · Lilia's Maze

Jan 16, 1999

20

E20 · The Fossil of Ruin

Jan 23, 1999

21

E21 · The Sea of a Mysterious Light

Jan 30, 1999

22

E22 · Wings of a Stone

Feb 6, 1999

23

E23 · Gamu Expelled!

Feb 13, 1999

24

E24 · The Determination of Agul

Feb 20, 1999

25

E25 · Showdown for Tomorrow

Feb 27, 1999

26

E26 · Final Resolution

Mar 6, 1999

27

E27 · A New Battle

Mar 13, 1999

28

E28 · The Advent of the Heatwave

Mar 20, 1999

29

E29 · The Distant City: Uqbar

Mar 27, 1999

30

E30 · The Demon's Cocoon

Apr 3, 1999

31

E31 · The Accursed Eye

Apr 10, 1999

32

E32 · The Future Seen Before

Apr 17, 1999

33

E33 · Battling the Legend

Apr 24, 1999

34

E34 · Crash of Souls!

May 1, 1999

35

E35 · Ransom for a Monster

May 8, 1999

36

E36 · The Sky of Reunion

May 15, 1999

37

E37 · The Fourth Symphony of a Nightmare

May 22, 1999

38

E38 · Ground-Breaking Tusks

May 29, 1999

39

E39 · Lake of Sadness

Jun 5, 1999

40

E40 · I Want to See Gaia!

Jun 12, 1999

41

E41 · Resurrection of Agul

Jun 19, 1999

42

E42 · Gamu vs. Gamu

Jun 26, 1999

43

E43 · The Silver Eyes of Izak

Jul 3, 1999

44

E44 · Attack of the Space Monsters

Jul 10, 1999

45

E45 · The Living Planet

Jul 17, 1999

46

E46 · The Attack of the Forest

Jul 24, 1999

47

E47 · X.I.G. Destroyed!?

Jul 31, 1999

48

E48 · Revenge of the Death God

Aug 7, 1999

49

E49 · An Angel Descends

Aug 14, 1999

50

E50 · The Cry of the Earth

Aug 21, 1999

51

E51 · Earth is Ultraman's Home

Aug 28, 1999