The story revolves around Duke Fleed who is a survivor of the Vega Star, raised by Dr. Umon as his adoptive son, and known as Daisuke Umon on Earth. Years after his arrival, he's faced with the threat of King Vega and his army, who want to conquer the Earth. With his friends Koji and Hikaru (and later his kid sister Maria Grace), Duke decides to fight back using his best weapon, the almighty Grendizer.
Koji Kaboto tries his OVT that he made with pieces of mecano. When flying, he is attacked by the UFOs of Vega. Fortunately Duke Fleed arrives on time to save the day (but not too q…
S01E02
Prince of the Other World
Oct 12, 197526 min
Koji discovers the identity of the Duke Fleed, but has no time to ask questions because Vega attacks. Duke Fleed and Koji unite their power and push back the enemy.
S01E03
The Tragic Fiesta
Oct 19, 197526 min
Dampee Makeeba organizes a party at the ranch and invites Koji and Duke Fleed. The latter has no time to eat anything because Vega attacks. Will he have the time to make it to Gren…
S01E04
The Island of Fear
Oct 26, 197526 min
Gandal wants to discover the hiding place of Grendizer. So he launches a massive attack. Koji tries to confront the enemies alone, but he only succeeds to crush himself on a desert…
S01E05
The Pitfall of Death
Nov 2, 197526 min
Koji, Hikaro, Goro and Bunta are taken in hostage. Actarus interrupts his siesta to free them.
S01E06
Attack on Perlepolis
Nov 9, 197526 min
Hikaro leaves for Perlepolis with Bunta. Their bus is attacked by a monster of Vega. Koji distracts the monster the time that Duke Fleed arrives (Grendizer has trouble to start up …
S01E07
The Feast of the Wolves
Nov 16, 197526 min
Janus, from the fearsome Ruins' Division, attacks Grendizer that is powerless in front of the brutality and the agility of his enemy.
S01E08
The Radars are Off
Nov 23, 197526 min
Blaki sets a trap to Grendizer by hiding mines in a cloud of spatial dust. Koji falls in the trap. Fortunately Duke Fleed helps him and destroys the Golgoth 8.
S01E09
The Black Moon Camp
Nov 30, 197526 min
Koji is captured with his UFO by the Vegans. Grendizer attacks the camp of the black Moon to save him.
S01E10
Vega's Spy
Dec 7, 197526 min
An inhabitant of the planet Rubi is contacted by Vega to explode the UFO carrier of Grendizer. The mission fails because of Duke Fleed and the Vegans try to kill the Rubinian. But …
S01E11
The Day when the Sun will Stop
Dec 14, 197526 min
The Vegans plan is to bring Grendizer to the shadow of the moon during the eclipse because Grendizer's systems will shut down temporarily under it and then destroy it.
S01E12
Blood on Snow
Dec 21, 197526 min
Daisuke and Kogi are sent to investigate an avalanche and to find survivors. They find a girl named Mirana who lost her memory. Back at Space Science Centre she begins to remember …
S01E13
By Iron and by Fire
Dec 28, 197526 min
A new Vegan mecha comes to destroy Earth. It sucks power from the sun and burns everything in its path. Grendizer is damaged by it and has to withdraw. As the mecha attacks again G…
S01E14
The Day of the Rising Sun
Jan 4, 197626 min
Boss, Nuké, and Mocha are in this episode. They are visiting their old friend Koji Kabuto. The Vegans keep their eye on a mysterious orange robot that is found skiing near-by. Comm…
S01E15
Red Akerae
Jan 11, 197626 min
Commander Yara is forced to create a mecha that creates earthquakes and use it on the city Kanto.
S01E16
The Fiancé of Death
Jan 18, 197626 min
A Vegan pilot lands near the Space Science Centre and makes Mr. Hayashi's fiancé, Kaori, a spy for him. She takes Dr. Umon as a hostage.
S01E17
The Infernal Ride
Jan 25, 197626 min
The Vegans begin building a base for their operations on Earth. The saucer "Giba Giba" begins to attack but Grendizer comes to save the day by saving a town and a mountain.
S01E18
The New Time of the Caves
Feb 1, 197626 min
Dr. Umon made a project so that Grendizer is able to launch without revealing his whereabouts to the enemy. Kabuto is control by the Vegans and fights Duke.
S01E19
The Crushed Town
Feb 8, 197626 min
A huge meteor is headed straight gives order to fire on the meteor and change its course to head for the planet Earth. The meteors are detected and Grendizer launches to intercept …
S01E20
Earth in Danger
Feb 15, 197626 min
Daisuke gets the suspicion that the Vegans may be planning to pull the moon down to Earth. Duke Freed launches Grendizer and follows Koji who already went to explore the area of Mo…
S01E21
The Submerged Continents
Feb 22, 197626 min
The Vegans plan to melt ice in the North Pole. This will cause the sea level to rise with catastrophic results to the shores on Earth.
S01E22
The Slayers of the Sky
Feb 23, 197626 min
The Vegans are planning to steal Dr. Chibana's new device so that they can use it to silence Duke Freed and his Grendizer.
S01E23
The Flood of the New Worlds
Mar 5, 197626 min
The Vegans continue their attempts to discover Grendizer's secret hideout as they are sure that the Space Science Centre has something to do with it. Hikaru finds out who Daisuke r…
S01E24
The Enforcer
Mar 12, 197626 min
Commander Witer successfully sneaks into Earth as Dr. Space who is a well-known acquaintance of Dr. Umon and a reliable person so he can find Duke Fleed and kill him.
S01E25
Fleed's Lovers
Mar 19, 197626 min
uke Freed's childhood friends Nayda, brainwashed by the Vegans, attempts to put a bomb on Grendizer but Duke stops her. Nayda accuses Duke of being a traitor. Koji attempts to pilo…
S01E26
The Edges of the Abyss
Mar 26, 197626 min
Dr. Umon sends Koji and Hayashi on a mission in outer space to build a satellite station. At the same time, the Space Science Centre is surrounded by a huge Minifo saucer squadron.
S01E27
Win or Perish
Apr 4, 197626 min
Grendizer's delicate weapon systems malfunction and he finds himself struggling against the enemy. The Vegans arrive and descend upon the Center. Hikaru and Daisuke must fix Grendi…
S01E28
The New Masters of Darkness
Apr 11, 197626 min
General Zuril is a brilliant scientist who will try to find different ways of taking down Grendizer. Daisuke, Hikaru, and Goro are attacked by Vegans and Danbi puts on his gear and…
S01E29
The Fire Bird
Apr 18, 197626 min
Vegans shrink the cells of the living body to make Harook become a young boy for a time so he can spy Space Science Centre. Harrok and Goro become friends but later the effects of …
S01E30
The Lightning Rock
Apr 25, 197626 min
A strange rock full of radiation energy lands on Earth and Dr. Umon can't make much of this new phenomenon. At the same time, the Vegans discover this strong source of energy and p…
S01E31
A Dreamer from Outer-Space
May 2, 197626 min
The Boss, Koji, and Bunta go to the Boss Borot to begin their counterattack of the Vegan attack on them but will face some technical difficulties. Grendizer gets into some trouble …
S01E32
The Ghost Queen
May 9, 197626 min
The Vegans send a woman by the name of Marian who looks identical to Duke Freed's mother who passed away on planet Freed.
S01E33
The Wings of Death
May 16, 197626 min
The Vegans send a bird named "Zari Zari" to distroy Grendizer, but Duke remember a similar bird from his home planet Fleed and will use this knowledge to go and finish it off.
S01E34
The Mercenary of Oppression
May 23, 197626 min
Vega promised Commander Gos that if he kills Duke Freed then Vega would spare the Wolf Planet from Vegan brutality.
S01E35
The First Raid
May 30, 197626 min
General Gandal assigns Commander Beetle with his saucer beast to attack the Space Science Centre from underground. Meanwhile, Koji Kabuto's new Double Spazer ship has just been com…
S01E36
The Invincible Cosmos
Jun 6, 197626 min
Dr. Umon calls Daisuke and Koji to show them the way that Grendizer and Double Spazer can unite together and fly. The objective of this is to minimize the need for Grendizer to hav…
S01E37
A Star is Dead
Jun 13, 197626 min
The Vegan plan is to steal a huge capsule full of Super Uranium from Earth. Vegan forces are dispatched immediately to do just that.
S01E38
Darkness Makers
Jun 20, 197626 min
Hikaru becomes a pilot. Duke Freed faces another Vegan saucer beast loaded with Vegatron rays, and Koji nearly gets captured by the Minifo after gathering the energy but manages to…
S01E39
The Patrol of Eagles
Jun 27, 197626 min
Danbi tells Daisuke that his daughter is outstanding and capable of helping him and Koji. Daisuke disagrees insisting that war and sport are two different things. Finally Daisuke w…
S01E40
The Awakening of Volcanoes
Jul 4, 197626 min
A series of explosions start to occur under the sea and General Zuril wastes no time in discovering that this is raw Uranium. Saucer beast "Boi Boi" is launched to go and get this …
S01E41
Baptism of Fire
Jul 11, 197626 min
Hikaru loses her consciousness during training and Duke Freed gets injured and his old wound gets worse. The Vegans begin their attack and Daisuke goes to the battle even though he…
S01E42
Peril in Abode
Jul 18, 197626 min
Dr. Umon's Space Science Centre is undergoing some major changes to keep up with Vega's attacks. A super computer is installed in the base, and turning it on will be the final step…
S01E43
The Victory of Eagles
Jul 25, 197626 min
A strange meteor heads slowly towards Earth and Koji will go unilaterally and see what it's all about. After nearly getting blinded by a ray that came out of the meteor, Koji's Dou…
S01E44
When Dogs are Loosened
Aug 1, 197626 min
A young man by the name of Hiyoshi is very interested in searching for ancient evidence to prove that spacemen came to Earth in the past. He goes to look at walls in a near-by cave…
S01E45
Ants and Men
Aug 8, 197626 min
With his telescope, Goro spots a meteor that splits in two with each piece landing in a different mountain. These actually contain eggs of the Vegan ants. When Goro tells everyone …
S01E46
The Ballet of Sharks
Aug 15, 197626 min
Vegan robot sharks land one night and are hidden in a public pool for their next plan. Koji finds himself a hostage of the Vegans who tell him about their plans to take all of the …
S01E47
The Ignited Lake
Aug 22, 197626 min
Danbi induces a race between Daisuke and Koji. Koji takes it to seriously. The group goes camping near a lake. Vegans begin to descent in the lake and then the Space Science Centre…
S01E48
World in Fusion
Aug 29, 197626 min
Duke Freed unites with Koji and the Drill Spazer to chase a Vegan saucer beast. The Vegans make an acid swamp to sink the Space Science Centre.
S01E49
The Last Survivor
Sep 5, 197626 min
Maria tries to kill Duke, thinking the person who pilots Grendizer is evil but during the fight Duke necklace falls and the siblings discover who each other is.
S01E50
The Four-Headed Eagle
Sep 12, 197626 min
Maria the new member on the team, is able to control Grendizer and Marine Spazer. She also has the ability to foresee events so she is able to save Koji from Vegans.
S01E51
The Black Star
Sep 19, 197626 min
The Vegan plan is to make this moon enter the Earth's atmosphere and cause a catastrophe. The battle between Vegans and Grendizer takes longer than anticipated and it is too late f…
S01E52
The Generation Of Monsters
Sep 26, 197626 min
General Zuril orders a powerful attack with his latest saucer beast "Domo Domo" to defeat Grendizer before General Dantos gets the chance.
S01E53
The Beast
Oct 3, 197626 min
Duke Freed will go after Hikaru who is hostige on foot not using Grendizer and help her escape from the giant beast while Koji takes Grendizer back for repairs.
S01E54
The Snake
Oct 10, 197626 min
The Vegan built a base underwater knowing that Grendizer cannot withstand depths great than 400 meters.
S01E55
The Loch Ness Monster
Oct 17, 197626 min
Vegans gather some fuel from an industrial island. General Zuril instructs General Gandal on what to do but he doesn't listen and he gets into trouble because his unilateral action…
S01E56
The Lynx of Outer-Space
Oct 24, 197626 min
Dr. Umon launches a satellite into space to track Vegan movements on Earth.
S01E57
The Monster And The Child
Oct 31, 197626 min
Koji and Maria are on their vacation in Tokyo, they get into a fight as usual and split up.
S01E58
The Lookalike
Nov 7, 197626 min
The Vegans make a false Grendizer that attacked Earth people so the real Grendizer will be hated.
S01E59
The Commando
Nov 14, 197626 min
A group of Vegan kids come to Earth and hold hostages the people inside the observatory.
S01E60
Rats
Nov 21, 197626 min
The Vegans attract a huge number of rats to use for their next mission. These rats are implanted with Vegatron bombs for the purpose of blowing up different targets in Tokyo.
S01E61
Pegasus
Nov 28, 197626 min
Toko 1, Toko 2, Toko 3, and Toko 4 are Vegan agents taking appearances of other people trying to distroy Space Science Centre.
S01E62
Swans
Dec 5, 197626 min
Swans are implanted with Vegatron missiles for the next Vegan plan. Duke Freed is forced to kill the swans and must head to the city and face saucer beast "Go Go".
S01E63
The Polar Bear
Dec 12, 197626 min
Kirika, a Vegan scientist, is sent to freeze with her new weapon Duke Fleed.
S01E64
5 Minutes To Die
Dec 19, 197626 min
The Vegans invent a bomb and General Gandal threatens to blow up Tokyo is Grendizer does not surrender.
S01E65
A Great Between The Greats
Dec 26, 197626 min
The Vegans fire a big group of missiles towards Tokyo. The Grendizer Team launches to destroy the missiles before they hit the city.
S01E66
Death Comes From The Sea
Jan 2, 197726 min
Maria in the Marine Spazer gets stuck in a giant seaweed trap and Koji swims to the bottom of the sea to help her.
S01E67
Diving Operation
Jan 9, 197726 min
General Zuril launches an attack on the Space Science Centre with air balloon bombs. Koji gets caught by the Vegans and held as hostage.
S01E68
The Great Pain
Jan 16, 197726 min
A young man from Freed named Kane is a loyal soldier of the Vegans. He comes to Earth to fight. Maria tries to face him and they both crash. Soon she will realize that Kane was her…
S01E69
Like Father, Like Son
Jan 23, 197726 min
The son of Zouril,Zuril Jr. wants to fight Grendizer but Zouril doesn't want him to. Zuril Jr. sacrifice himself for his father in the end.
S01E70
The Imposter
Jan 30, 197726 min
Maria has a nightmare about her father being hostage. She goes to the cave where she saw her father in her dream along with Koji where she learns the truth.
S01E71
Best Friend
Feb 6, 197726 min
Moros, Duke's best friend from Freed was made to believe that Duke Freed destroyed Freed by Vega and now comes to Earth to kill Duke.
S01E72
Princess In Love
Feb 13, 197726 min
Princess Rubina, Duke Fleed's fiancé comes to Earth to tell Duke that his planet is no longer polluted but dies after being shoot by one of Vega's generals.
S01E73
For The Love Of Earth
Feb 20, 197726 min
King Vega prepares to attack Earth but Duke and company are ready to stop him with the help of Grendizer and Spazers.
S01E74
This Is Not Goodbye
Feb 27, 197725 min
Duke finally destroys King Vega but he and Maria must return to planet Fleed.