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 for Grendizer to fire the missile.

General Zuril orders a powerful attack with his latest saucer beast "Domo Domo" to defeat Grendizer before General Dantos gets the chance.

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.

The Vegan built a base underwater knowing that Grendizer cannot withstand depths great than 400 meters.

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 revealed that the Vegans have a base on Earth.

Dr. Umon launches a satellite into space to track Vegan movements on Earth.

Koji and Maria are on their vacation in Tokyo, they get into a fight as usual and split up.

The Vegans make a false Grendizer that attacked Earth people so the real Grendizer will be hated.

A group of Vegan kids come to Earth and hold hostages the people inside the observatory.

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.

Toko 1, Toko 2, Toko 3, and Toko 4 are Vegan agents taking appearances of other people trying to distroy Space Science Centre.

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".

Kirika, a Vegan scientist, is sent to freeze with her new weapon Duke Fleed.

The Vegans invent a bomb and General Gandal threatens to blow up Tokyo is Grendizer does not surrender.

The Vegans fire a big group of missiles towards Tokyo. The Grendizer Team launches to destroy the missiles before they hit the city.

Maria in the Marine Spazer gets stuck in a giant seaweed trap and Koji swims to the bottom of the sea to help her.

General Zuril launches an attack on the Space Science Centre with air balloon bombs. Koji gets caught by the Vegans and held as hostage.

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 childhood friend from Freed.

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.

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.

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.

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.

King Vega prepares to attack Earth but Duke and company are ready to stop him with the help of Grendizer and Spazers.

Duke finally destroys King Vega but he and Maria must return to planet Fleed.

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. Commander Blacki orders the Minifo to follow it and investigate.