I rewatched the Inhumanoids Cartoon Series from the ‘80s

September 30, 2025

A creepy yet nostalgic 1980s cartoon, Inhumanoids follows Earth Corps battling terrifying underground monsters with help from elemental allies.

When I was in second grade (that was around 1989), I used to watch a cartoon series called “Inhumanoids” every day after class. I remember liking this show because it was a cartoon, I mean, I generally loved all animated series when I was a kid. Even so, I recall Inhumanoids giving me the creeps every time I watched it. In fact, there was one episode in which I had to stay away from the TV because D’Compose was too scary for me (I think this was the time when he turned Sandra into an undead monster).

I rewatched the Inhumanoids Cartoon Series from the ‘80s
Inhumanoids (photo from The Reflector Files)

Anyway, I wanted to relive the excitement of watching this cartoon series again, so I watched all the episodes on YouTube. And, yes, Inhumanoids was crazy and still creepy. At some point, I was thinking if it was really made for kids because it was violent, the monsters were seriously scary (not cute scary), and there was even a touch of politics involved. in any case, if you want to see it for yourself, it’s still available on YouTube.

About Inhumanoids


The animated series, as well as the action figures, were released in 1986. It’s about a group of scientists called Earth Corps who defend the world from underground-dwelling monsters called Inhumanoids ( Metlar, the leader of the Inhumanoids; D'Compose, a gigantic undead monster; and Tendril, a plant monster) together with the help of elemental beings called the Mutores.

The show was was produced by Sunbow Entertainment and Marvel Productions and animated in Japan by Toei Animation.

Series Plot


It all kicks off when Earth Corps, a government science team, digs up a creepy monster trapped in amber in Big Sur. That discovery sets off a chain reaction: Blackthorne Shore, a shady industrialist, secretly unleashes another beast named Tendril, who crashes the unveiling of the amber in San Francisco to free the grotesque D'Compose. Chaos erupts, and both monsters vanish into the bay.

Liquidator from Earth Corps heads back to Big Sur and stumbles upon the Redwoods, a group of wise, sentient tree beings who reveal that these monsters, called Inhumanoids, were sealed underground ages ago. Their leader, Metlar, is still trapped thanks to a magnetic Mutore duo named Magnokor.

Things spiral fast: Tendril attacks, Earth Corps retreats, and their funding gets slashed by a corrupt senator. Luckily, Blackthorne’s sister Sandra steps in to help. The team upgrades their gear and dives back underground, but Metlar gets freed, Sandra gets mutated, and Blackthorne joins the fight with his own tech.

Eventually, Earth Corps allies with the Granites and Redwoods, battles through monster domains, and even convinces D'Compose to help stop Metlar’s plan to blow up Earth’s core. After a wild showdown, the monsters are re-imprisoned, Blackthorne is arrested… but one ominous tissue sample has mysteriously vanished.

The rest of the episodes saw the Inhumanoids and other villains wreaking havoc on the city but they are subdued by the Earth Corps and the Mutores.

At the end of the series, peace is restored, but the Earth Corps pledged to protect the Earth against danger from the Inhumanoids.

Closing


The Inhumanoids is a well-made series. The story was solid, and it was a great animated action series. It was overall creepy and suspenseful at the same time. If you are someone like me who grew up in the ‘80s to ‘90s, you would find this show nostalgic. I was also quite surprised that I remembered most of the scenes in the series, especially the ones that are weird or spine-chilling.

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