The CREW GUYS team is attacked by space monster Dinozole. However, the first Ultraman in 25 years appears, Inter Galactic Defense Force rookie Ultraman Mebius!

Mebius works together with Ryu to recruit new team members: Marina, George, Teppei and Konomi. But then, monster Gudon emerges!

The Volcano Monstrous Birdon that once defeated Ultraman Taro appears! When Ryu sees Ultraman fight Birdon's poison, he makes a decision.

Maquette Monsters can fight alongside humans as allies. Miclas seems to follow Konomi's commands. Just then, the space monster Kelbim appears!

Mirai challenges George to a soccer match to keep him from quitting GUYS. A blue giant suddenly appears as Mebius and GUYS are waging battle.

Ryu and Marina head down to investigate the seabed, and hear an eerie woman's laugh! The woman unleashes light and monster Twintail appears!

The emergency rations Alien Fanton dropped on Earth begin to grow infinitely! When the team is out of options, they turn to their captain...

Ryu is bewildered when he finds out that Serizawa is the blue giant Hunter Knight Tsurugi.

GUYS determine if they attack Bogarl recklessly, they'll destroy the entire city. However, revenge against Bogarl is everything to Tsurugi.

The operation to exterminate Bogal would put the lives of Mebius and others in danger. Will GUYS be able to save Mebius and Tsurugi?!

Dinozole has been resurrected as the twin-headed Dinozole Reverse! Tsurugi comes to the rescue returned to his true form of Ultraman Hikari!

Toriyama loses a dangerous Meteor that can enter hollow objects and move them. It has already entered the statue of the god of business!

The appearance of Mukadender strands Marina and her coach in the mountains. Marina decides to draw Mukadender's attention and use herself as bait!

An Insectus larva that infected a human being was repeatedly molting inside a hospital, continuing to grow...

Gun Phoenix breaks down and Ryu deploys the new state-of-the-art craft Gun Booster. Ultraman Hikari manages to mount a daring rescue!

A duel between aliens takes causes a comet to head for Earth. Amidst the confusion, Space Swordsman Zamsher challenges Tsurugi to a duel!

Ultraman Hikari is fatigued from countless battles. Ryu takes control of Hikari and executes a dangerous maneuver, Formation Yamato!

Mebius is the only Ultraman left on Earth. When Mebius finds himself in danger, he is saved by a new power Hikari left behind!

Three identical Monster Digarugue land in Japan! Only George is able to see them. He attempts to single-handedly use the new weapon, METEOR Shot!

An experiment using sound waves summons two large monsters. To make things worse, General Misaki and Aide Maru are caught up in the attack!

GUYS discover a distress signal from the spaceship Arandas. They find the remains of the Arandas and a graveyard of banished monsters!

The police ask Marina to help investigate a case of mass disappearances. Marina is dragged into the past and encounters herself as a child!

Mirai is challenged by the powerful enemy who possesses Ryu and isolates Mirai. There is no choice but to shoot Ryu to defeat Yapool.

Yapool uses Terrible-Monster Doragory to take control of Professor Fujisawa. He plans to use the Meteor Cartridge to destroy the base.

Fujisawa develops a new Meteor that could prevent the invasion of terrible-monsters. That's when terrible-monster Verokron suddenly attacks!

A monster battle simulation goes wrong and the powerful Monster Zetton goes out of control. Mirai digitizes his body to challenge Zetton!

Konomi reunites with an old friend named Suzaki. However, Suzaki is working with a gossip columnist to get compromising footage of GUYS!

Mebius must return to the Land of Light when powerful monster Inpelaizer appears! To protect his friends, Mirai transforms in front of Ryu!

Ultraman Taro arrives to hold off Inpelaizer, while Mebius disappears. However, Inpelaizer is immune to even Taro's Ultra Dynamite!

UFOs appear all around the world. This new race of flying saucer aliens have orders to exterminate Mebius.

An Alien Mates appears on Earth. He then shares a story of how an innocent Alien Mates was killed by humans 30 years ago.

Teppei falls head over heels for a girl named Misa, but she is possessed by Femigon. Defeating Femigon could kill Misa.

Mebius is defeated by Alien Reflect . Ultraman Leo tells him that if he can't win, he can't be entrusted with protecting Earth.

Tsurugi appears to be destroying a city on Earth. Mirai is shaken as the world turns against Ultraman Hikari.

A girl claiming to be Mirai's younger sister turns out to be an Alien Psychokino. Aide Toriyama tries to capture her due to his fear of aliens.

Today is the Advent Festival for Father of Ultra. Monster Jashrine appears, and Mebius' body is turned into a golden statue!

Mebius struggle against Arigera, but are saved by Isana, an elite member of GUYS Ocean. Can they capture the amazingly fast Arigera?!

Sayuri Hinode is resurrected when by an Alien Serpent. However, Alien Serpent's objective is to infiltrate Earth in order to take it over!

Mirai meets a lonely high school girl named Naoko. Monster Solitura, which takes advantage of lonely hearts, invades Earth.

Ultraman 80's former students are planning a reunion. 80 is reluctant to see them after leaving the school without saying goodbye.

After being defeated by Mebius, Red King returns as Gomora! Meanwhile, Supreme General Chancellor and Captain Sakomizu speak privately.

Mirai battles Mebius-Killer, an enemy created by Yapool. How will he face a foe with identical powers as himself?

Yapool traps Mirai, Aya and Hirukawa on a ruined world. Meanwhile, the team members on the Phoenix Nest are attacked by Lunaticks.

Deathrem has taken members of GUYS hostage. Mebius is unable to fight the rampaging Deathrem. The public criticizes Mebius for not fighting.

One of the Dark Four Heavenly Kings Grozam freezes Mebius! GUYS executes a rescue operation, but the team is already in rough shape.

Mebius and Alien Mephilas have switched places! He desperately tries to get his friends to remember the truth, but GUYS attacks Mebius!

Mirai collapses after an onslaught of fierce fighting. The Alien Empera demands the world hand over the Ultraman Mebius.

The injured Mebius and Hikari do not have the strength left to fight, but they are rescued by past alien rivals and friends!

Mebius is finally defeated. The cries of despair reach the Ultra brothers. Together they try to revive the sun made dark by the Alien Empera.