- Ian Ziering as Dr. Niko "Nick" Tatopoulos.
- Charity James as Dr. Elsie Chapman
- Malcolm Danare as Dr. Mendel Craven
- Rino Romano as Randy Hernandez
- Bridgette Bako as Monique Dupre
- Tom Kenny as N.I.G.E.L.
- Frank Welker as Godzilla (vocal effects)
In the series, Godzilla (the baby that survived the destruction of Madison Square Garden and hatched from the egg at the end of the 1998 film--often nicknamed Zilla Junior by fans) battles a large group of giant monsters. The show tracks Godzilla and team H.E.A.T. around the planet battling new mutations and other monstrous beasts. While most of the enemies that appear are mutated animals, other creatures appear as well, including extraterrestrials, plants, machines, and on a couple of occasions even beings with supernatural, "magical" origins.
The series not only had Godzilla battle several other kaiju, such as a Giant Bat, but also face a fleet of invaders known as "Tachyons" in a tribute to Destroy All Monsters, and an eccentric billionaire rival of Nick's. In an ironic twist from the original Godzilla TV adaptation, in the 1998 film, Godzilla has a flammable power breath similar to fire, while in the series, his son breathes a green atomic breath.
The series also expands on the personalities and relationships of the human characters, going deeper into the development of the characters from the film as well as introducing new ones for the series. It also explains the loyalty of Godzilla toward the crew, as he has 'adopted' Nick as a father figure of sorts, and goes to great lengths to defend him.
- New Family: Part 1
- New Family: Part 2
- Talkin' Trash
- The Winter of Our Discontent
- Cat and Mouse
- What Dreams May Come
- Bird of Paradise
- Monster Wars: Part 1
- Monster Wars: Part 2
- Monster Wars: Part 3
- Bug Out
- Web Site
- An Early Frost
- Trust No One
- Future Shock
- Cash of the Titans
- Freak Show
- End of the Line
- What a Long, Strange Trip It's Been
- Wedding Bells Blew
- Area 51
- The Twister
- Where is Thy Sting?
- Lizard Season
- Underground Movement
- Ring of Fire
- The Ballad of Gens Du Marais
- Tourist Trap
Despite the negative reaction to the film, Godzilla: The Series garnered surprisingly positive reactions from fans and it did well in the TV ratings. The series followed the adventures of Dr. Nick Tatopoulos, a major character from the film, and Godzilla's surviving baby. The series returned Godzilla's trademark characteristics to the monster in the series, including his strength and nigh-indestructibility, his atomic breath and general masculinity. This Godzilla follows Dr. Tatopoulos and the members of H.E.A.T around, having imprinted upon Nick as his own parent, and fights various other monsters that have been formed by nuclear radiation, in the style of the late Showa era. The fan response to the series was overall very positive, and the animated Godzilla gained much respect from those who hated the film.
- Early in production, the series was made under the name HEAT Seekers to prevent rumours the show was a Godzilla show, where the premise was of fire-themed superheroes, and Godzilla was referred to only as Gorgon or Thingy.
- The characters Elsie Chapman and Dr. Mendel Craven from the film return and star in expanded roles in the series (however they look significantly different from their appearances in the live-action movie).
- Colonel Hicks and Dr. Craven are voiced by the same actors that portrayed them in the 1998 film.
- Zilla Junior is significantly upgraded from his father to be more like the original Japanese Godzilla: he attacks the military forces that strike him instead of fleeing, he fights other giant monsters, he is far more resistant to conventional weaponry, and he posesses the trademark atomic breath (it is green as opposed to blue, however).
- The plot of the series is very similar to The Godzilla Power Hour: a research team operating a boat frequently encounter hostile monsters and can summon Godzilla to fight them.
- Though no Toho kaiju appear in the series due to licensing issues, some of the monsters seem to be homages to pre-existing kaiju:
- Megapede and its Cicada form are a homage to Battra.
- Cyber-Godzilla is a reference to Mechagodzilla (it being a resurrected dead kaiju made a cyborg may also be inspired by Mecha-King Ghidorah).
- The D.R.A.G.M.A. are somewhat based on Destoroyah.
- The Giant Turtle has similarities to Anguirus (its prominent lower tusks are reminescent of Gamera as well).
- The Crackler shares similarities to Gabara.
- The Robo-Yeti seems to be an homage to Mechani-Kong.
- Quetzalcoatl is based on Rodan.
- Norzzug is similar to King Caesar.
- Due to programming laws in the 1990s, Godzilla: The Series was unable to show or mention death. As such there are no human fatalities shown in the entire series, while monsters that are killed are usually said to be "destroyed" instead of "killed."
- Every time helicopters or aircraft are destroyed, the shots always linger to confirm the pilots survival.
- While this is the case, in the episode Shafted, there are some petrified and presumably dead miners. In the episode Future Shock, it is implied that a large portion of the human population was wiped out by the D.R.A.G.M.A.s in an alternate future, while Mendel Craven explicitly says that Godzilla died fighting the D.R.A.G.M.A.s.