In the future, Earth has been ravaged by nuclear war. Survivors are captured by an evil alien race of the Galran Empire led by the ruthless King Daibazaal to work as slaves or fight in a deadly arena. Five captured Earthlings: the fearless Captain Akira “Chief” Kogane, the silent Takashi “Quiet” Shirogane, the strong Tsuyoshi “Hothead” Seidou, the reckless Isamu “Moody” Kurogane and the small but crafty Hiroshi “Shorty” Suzuishi, will attempt to escape the dungeons of Castle Galra before they are again forced to fight in the arena or worse, turned into massive Beastmen monsters.

After escaping Castle Galra, the team crash lands on the mysterious planet of Altea. Inside the ruins of a once beautiful castle, they find the last surviving occupants in former military strategist Raible and the beautiful Princess Fala. With guidance from the ghost of her deceased father King Raimon, the Princess believes these five strangers are destined to uncover the secret of “GoLion” an incredible weapon of defense and the last hope against the Galran Empire.

Under the wicked advice of his mystical advisor Witch Honerva, the evil King Daibazaal sends a Deathblack Beastman monster to the planet of Altea to search for the missing Earthlings. But the team is ready to fight back as they search for the last key to the fifth robot lion of GoLion! Will they find the missing key before the Kingdom of Altea is wiped out once and for all?

Having been seemingly defeated by King Daibazaal’s giant Deathbeast, the GoLion team must regroup and convince Princess Fala’s mice to surrender the last remaining key to form the invincible warrior known as GoLion. When the evil Galrans return to finish the fight, the legendary GoLion returns and the team has brought the Kings Sword Jyuohken with them to finish the fight!

With the return of GoLion, the universe once again has hope against the evil Galran Empire, but the residents cannot be convinced to join the resistance. Daibazaal sends a new and more powerful Beastman nicknamed “Death Hell” to destroy GoLion once and for all. The battle is on as Princess Fala joins the fight and transforms the decaying Castle Altea into the incredibly fortified Castle Gradam!

With the Kingdom of Altea restored, the heroes begin to distribute food to the war-torn citizens only to walk into a dangerous trap of the Witch Honerva. Using a Beastman known as Galcia, she manages to kill the Blue Lion pilot “Quiet” Shirogane! How will they battle the monster Galcia without the ability to form GoLion?

With the absence of Blue Lion pilot Shirogane, Princess Fala is determined to learn how to pilot the mighty Robot Lion and take his place alongside the GoLion team! Her returning nanny Ms. Hys thinks otherwise, but her skills will soon be put to the test when Galra General Sadak unleashes a Beastman upon the villagers of Altea!

A dashing visitor known as Bambara shows up and impresses all but “Moody” Kurogane. The team considers giving him a chance to pilot Blue Lion but when a cobra attack in the night is blamed on King Daibazaal, no one suspects it could originate from this mysterious new stranger whose Galran roots are soon to be revealed…

An Earth girl names Lisa is rescued by the team after being shot down by the Galran forces. Lisa explains she escaped from Castle Galra which earns “Hothead” Tsuyoshi’s sympathies as he had a sister about her age. It is soon discovered that Lisa has psychic powers and is nothing but a saboteur for the evil Witch Honerva to destroy the Castle Gradam from the inside!

A majestic white lion appears to Princess Fala in a dream when she intercepts as the spirit of her mother. When she follows this symbolic creature in real life she finds herself at the mercy of the with Honerva who transforms the lion into a Beastman named Lian which traps the rest of the team as well. Can Raible and Hys save the day inside the Blue Lion?

A deadly rain of blood soaks the Alteans who panic at this apocalyptic symbol as it triggers a river of flames which the lions of GoLion must extinguish. This leads to a hostage stand-off situation where “Shorty” enlists the help of a village child to fool General Sadak and rescue the rest of the team who must battle a giant Deathbeast known as Guirus.

King Daibazaal has conquered the planet of Jarre forcing the inhabitants to create a statue honor of his 500th birthday. When two young slaves escape to Altea, the GoLion team spring into action and must battle twin Deathbeasts and attempt to liberate the planet from the grip of the Galra Empire.

Princess Fala’s aunt, Queen Elena has seemingly returned to Castle Gradem but with a colder personality than Raible remembers. The mice are suspicious as well and when the with Honerva’s demon cat Jaga shows up they realize it is a trap. Can Shorty and the team convince Fala in time before she is assassinated?

After numerous failures by General Sadak, Emperor Daibazaal is about to execute the failed commander when Daibazaal’s son Prince Sincline returns from his bloody conquests of other planets. Sincline is disturbed by rumors of GoLion’s return and goes to attach Altea directly but is quickly infatuated by the beauty of Princess Fala. Sincline takes on Kogane in a one-on-one battle as Sadak is turned into a Deathbeast and attempts to destroy GoLion himself!

Princess Fala has been training inside Black Lion as she attempts to earn the respect of the other GoLion team members. Meanwhile, Prince Sincline launches an all out attack, demanding Altea surrender Fala or be destroyed. Fala surrenders herself to Sincline to avoid his wrath on her people but is rescued by Kogane who is injured in the battle. But will the team be able to destroy the Beastman “Blockgod” and defend against the Galran onslaught?

Princess Fala must choose one of the boys to reenact a celebration of the legend of a “love bridge” which connected the kingdom of Altea and Helena. “Hothead” gets the nod but the ceremony soon becomes a battle as Prince Sincline is determined to run the festivities with his Deathbeast “Galgo”. Will Princess Fala become another trophy in Prince Sincline’s harem?

Planet Altea has long-standing rivalry with Planet Heracles that turns deadly when King Heracles conspired with Emporer Daibazaal to join forces and destroy Planet Altea. Heracles offers up his strongest son, Samson, to be turned into a Deathbeast and destroy GoLion. But during the battle, Sincline betrays Heracles and becomes infatuated with Princess Amue who bears a striking resemblance to Fala, and captures her. Her brother Prince Alor seeks the GoLion’s help in rescuing her and taking down the Galra Empire once and for all.

Emperor Daibazaal is near death and the only cure, according to Honerva, is with the blood of a young girl. Prince Sincline goes to Altea and corners Fala by transforming the forest into monstrous trees which combine into a Beastman named Treeder who battles GoLion. Sincline decides to put his father out of his misery by offering him a poisonous formula but will it work?

An earthquake on Altea reveals a legendary hidden castle which Shorty is sent inside to investigate where he finds some frightened local children. When Honerva’s cat Jaga is spotted inside the group realizes it’s all a trap! It’s up to Kogane and the rest of the GoLion team to stop Honerva and take down the Beastman!

The GoLion team defies Raible and returns to Earth only to find it a shell of its former self and hours away from total destruction. Prince Sincline attacks them on Earth and almost succeeds only to be thwarted by Princess Fala. After the destruction of Earth and a battle with Beastman Batolda, Fala encourages them to think of the Planet Altea as their new home.

A captured Princess Amue is determined to escape from Sincline’s dungeon. With some help from the GoLion team she is able to but things get complicated when Honerva disguises herself as Amue which leads to a prisoner exchange with Princess Fala. It’s up to Kogane to brave a blizzard and take on Sincline himself!

Mysterious seeds fall from above and cause the Altean people to become deathly ill. Doctor Gior confirms the cure lies on the Planet Amazon. Moody takes the Blue Lion to the planet where he inadvertently offends the native princess Aimee and has to battle the King of the Amazons and a Galra trap set by Honerva and Sincline! Will Moody be able to survive and save both planets?

Honverva plots to attack Altea on the thirteenth of the month as the GoLion team is enjoying a summer swim. Fala is disciplined for her choice of swimwear and is locked in her room during the battle only to be confronted by Sincline himself! When a giant Beastman named Kauman gets involved this will be a Friday the GoLion team will not forget!

A pack of evil alien rats are sent to Castle Gradam to destroy it from the inside. It’s up to Fala’s mice to help save the day but the problems go from small to large when the evil rats combine to form a Beastman known as Catgun! Can the mice help save the day and win some cheese in the process?

Emporer Daibazaal has a secret new weapon being developed on the Planet Mura in the form of a massive cannon capable of destroying even GoLion! Moody and Kogane infiltrate the planet and attempt to sabotage the project but encounter a former slave with a vengeance against Altea!