''Ultraman Neos'' is a {{toku}}satsu DirectToVideo entry to the ''Franchise/UltraSeries'' that was released from November 1999 to January 2000.

Every three million years, the Solar System passes through a place called the Unbalanced Zone. At the dawn of the 21st century, as the Earth's population rises, the Solar System passes the Unbalanced Zone once again, where Dark Matter starts the appearance of monsters. Genki Kagura of the Hi-Tech Earth Alert and Rescue Team ([[FunWithAcronyms HEART]]) is working with a space team when meteorites pummel a satellite that's being operated on. Kagura saves the team just as the satellite explodes, ejecting him into space. Miraculously, he survives and later rejoins his team to investigate a rockslide incident that might be related to the appearance of Japan's first monster.

When the monster, Aranagaruge, appears with Nana Hayami, a child, and his dog endangered, Kagura must access the memories he lost while drifting through space and learn the origin of his survival. He would later fight monsters made of Dark Matter, occasionally assisted by Ultraseven 21 (Pronounded "two-one")

''Ultraman Neos'' was originally supposed to be the back-to-basics entry that revived the ''Ultra Series'' in the Heisei era. Since the network wished for a more original series, ''Series/UltramanTiga'' was created. Most of the ideas brought up in the pilot were used for ''Tiga'', ''Dyna'', and ''Gaia'', so ''Neos'' felt a bit SoOkayItsAverage by the time it was released.

!!''Ultraman Neos'' provides examples of the following tropes:

* AlternateUniverse: Despite the appearance of Zoffy and M78, ''Neos'' takes place in a different universe.
* AntiVillain: Zamu-seijin, whose very planet and culture was destroyed by Dark Matter, and every appearance has them being the cosmic playthings to the Unbalanced Zone.
* ArbitrarySkepticism: Takayoshi Hino's initial doubt about monsters, even though one of HEART's major purposes is to deal with such threats in the first place.
* BeCarefulWhatYouWishFor: The kids who wish to keep a dinosaur roller coaster ride open try to spread a rumor of a dinosaur monster to HEART. They next try to create a monster of their own. By the stroke of luck of Dark Matter, the creation of King Dinas unwittingly get their wish.
* BewareTheNiceOnes: Bamos is a friendly, affectionate ape-like creature... until you hurt his loved ones, in which case he grows into the AxCrazy King Bamos and electrocutes you to death. There's a reason he's the top dog on the island.
* BridgeBunnies: Ayumi Kitabayashi. Other times, she's being TheSmartGuy.
* TheCameo: Zoffy
* {{Expy}}: Bamos is clearly reminiscent of the classic Pigmon... except for the part where he is a SizeShifter and the King of the island of monsters.
* EverythingsBetterWithDinosaurs: King Dinas is the ultimate example, though like all ''Ultra'' series, there are many others.
* FunWithAcronyms: '''H'''i-Tech '''E'''arth '''A'''lert and '''R'''escue '''T'''eam.
* GreenAesop: The episode with the monster Lefreshion plays the aesop in an interesting manner. While the monster can heal plants, the healing bubbles are poison to humans. This wouldn't concern the girl who thinks she's controlling him -- except for the part where all the other animals are also negatively affected.
* HiddenDepths: Secretary Yoko Fujiwara, a liaison between HEART and the government, initially comes across as a StopHavingFunGuys ObstructiveBureaucrat. However, her friendship with Dr. Otome and her manhandling of an even greater ObstructiveBureaucrat shows she's loyal to the team.
* ParentalAbandonment: Ayumi lost her parents while she was in college.
* SizeShifter: Bamos to King Bamos when you piss him off, and Ultra Seven 21.
* [[TwelveEpisodeAnime Twelve Episode]] {{Toku}} [[BonusEpisode plus one OVA]].