The year is now 2041 AD. A new enemy called Zeravire suddenly appears in the solar system, destroying all military installations it comes across. However, a wealthy man named Klein Sandman is already aware of this planned invasion and had been secretly preparing his army for battle. His trump card is Gravion, a giant robot that utilizes gravity as its source of energy. Meanwhile a young man named Eiji secretly enters Sandman's base in search for his missing sister. It is there that he meets another young man by the name of Toga... These two must now fight together with four other individuals aboard the super robot, Gravion to fend off the Zeravire threat.

Season 1 Episode 1 - Fortress of the Diety

While searching for his missing sister, Eiji Shigure secretly enters the castle of millionaire Klein Sandman. There he meets the castles strange inhabitants and is selected to join in Sandmans mission to stop a destructive alien known as the Zeravire. The teams weapon, a series of fighting robots designed by Sandman called the Gran Kaiser and the Gran Divas who when needed join together to form Gravion. Air Date : 8th-Oct-2002  Read More

Season 1 Episode 2 - Mission of Gravity

The newly formed Gravion faces off in their first battle against the Zeravire and the pilots discover their weaknesses. Meanwhile The Earth Federation Alliance plan their own attacks on the Zeravire. Air Date : 15th-Oct-2002  Read More

Season 1 Episode 3 - Labyrinth

Eiji begins to get used to life in Sandman's castle and to the castles inhabitants. As he and Toga venture to the forbidden area of the castle in search of Eiji's sister Ayaka and the identity of the G-Shadow's pilot, Raven attempts to convince the EFA to allow Earthgertz to take the lead in the defense against the Zeravire. Air Date : 22nd-Oct-2002  Read More

Season 1 Episode 4 - The Princess in the Tower

When a ghostly figure is sighted in one of the castle's towers, Toga and Eiji go to investigate. There they discover Leele, the mysterious pilot of the G-Shadow. Air Date : 29th-Oct-2002  Read More

Season 1 Episode 5 - The Girl Who Wouldn't Laugh

In an effort to get to know each other better, the team goes on a picnic together but Leele is hesitant to share as she is haunted by nightmares of her past. Meanwhile the EFA attempts to find information of Sandman. Air Date : 5th-Nov-2002  Read More

Season 1 Episode 6 - Toga's Day Off

Eiji sneaks out of the castle during the staffs shopping day and takes Toga along with him for his first day out of the castle and his first day in the big city. As the maids search for them, the Zeravire launch an attack on the city. Air Date : 12th-Nov-2002  Read More

Season 1 Episode 7 - Drill Girl on the Beach

On the anniversary of her father Isanas death, Luna returns home to the island of Okiaowa but is surpirsed when she finds that the rest of of the Gran Knights have decided to accompany her to the have some fun on the island. But all fun is soon ended when the Zeravire target the International Peace Conference for their next attack. Air Date : 19th-Nov-2002  Read More

Season 1 Episode 8 - Storming the Castle

When the Zeravire attacks the the castle, all hope of stopping it lies with Eiji, who has accidentally found himself piloting the Gran Kaiser. To survive he must call upon all the power of the Gran Kaiser and all that his body can withstand. Air Date : 26th-Nov-2002  Read More

Season 1 Episode 9 - A Distant Embrace

Repairs begin on the castle following the attack by the Zeravire and Eiji begins to recover from his battle but runs from his physical and runs into Mizuki who gives him insight to the disappearance of his sister Ayaka. Together they decide to investigate where she vanished, the West Tower. Air Date : 3rd-Dec-2002  Read More

Season 1 Episode 10 - Crack

Following recent events, Sandman reluctantly has an auto-pilot device, The Gran Phantom intstalled into the Gran Kaiser in case of emergency. And one does arise when a Zeravire with a nuclear power supply attacks and one of the maids is put in danger, causing Eiji to try and rescue her while the rest of the Gran Knights use the system and go into battle with out him. Air Date : 10th-Dec-2002  Read More

Season 1 Episode 11 - The Thing That Was Lost

After seeing what darkness Toga is capable of in the heat of battle, Eiji quits the Gran Knights and leaves the castle to return to a normal life. Leele ventures to town to convince Eiji to come back. Two pilots down, Gravion must operate with its auto-pilot taking up the slack when the Zeravire attack. Air Date : 17th-Dec-2002  Read More

Season 1 Episode 12 - Because You're With Me

The battle wages on as Gravion fights against the attacking Zeravire with a failing auto-pilot and Eiji and Leele still missing. But after his friend Yumi is injured in the attack, Eiji decides that his place is with the rest of the Gran Knights on Gravion. Air Date : 24th-Dec-2002  Read More

Season 1 Episode 13 - White Steel Fang

The Zeravire have been evolving, not in order to destroy humans, but to ensure the destruction of Gravion. When the new and improved Zeravire comes to Earth to challenge Gravion, Sandman is hesitant to let the Gran Knights go to battle but they refuse to sit on the sidelines. With no other choice, Sandman must authorize the use of Gravions most adavanced weapon. Air Date : 31st-Dec-2002  Read More