#1 - The Man Captured in the Past
Season 1 - Episode 10
Rather than focusing on Casshern, this episode follows Dio and his quest to reestablish his utopia by gathering wandering robots to form his army. During the gathering, a mysterious robot dressed heavily in tattered cloak barges in rambling about the death of Luna. It is revealed the robot’s name is Dune, a guardian assigned as Luna’s bodyguard. Leda attempts to dispose of Dune but in the end requires Dio’s help. It was in a fit of rage for being mistaken as Casshern, Dio viciously incapacitates Dune. As Dio with Leda by his side raises the spirits of the wandering robot with his speech, a broken down Dune once again wanders the lands morning the death of Luna.
#2 - Drops That Are Named Eternity
Season 1 - Episode 22
Dio captures Casshern and brings him back to Luna's castle. Leda wants Dio to be healed along with her by Luna, but he refuses. Leda finds Luna and orders her to heal only those that are chosen, like her. Meanwhile, Braiking Boss is followed by robots on the verge of ruin. Leda receives Luna's healing, but it is not enough as she starts to break down again. She demands more healing from Luna, who complies. However, the increased healing she receives is much more painful than the first one. Dio takes Casshern away for him to regenerate so that he can battle him again in a fair fight. Casshern learns that Dio's reason to live is to defeat him. After a painful regeneration, Casshern prepares for one final battle with his arch-nemesis.
#3 - The Praise of Hope
Season 1 - Episode 8
Casshern escorts a robot singer named Janice, who wants to travel to a dilapidated city known as the Bazaar in order to sing to robot refugees who had been hiding there from the ruin of the outside world. Standing in their way are robots who believe that hope should die in a world full of ruin and, once they reach the Bazaar, will massacre everyone in sight. Once Casshern and Janice finally reached their destination, it is discovered that she is also at the brink of ruin, so she dedicates one final song to Casshern while he defends her and her audience from a horde of murderous robots outside.
#4 - At the End of the World
Season 1 - Episode 1
In the near future, an amnesiac Casshern fights anti-human robots on a desolate Earth. Most of the humans were killed in an apocalyptic war when he was serving under the direction of Braiking Boss after he assassinated a girl named Luna. During his quest to find out who he is, Casshern befriends a human girl named Ringo. However, Ringo finds herself to be scared of Casshern after he kills a robot who was trying to attack her. Not long after, he faces against an anti-Casshern mercenary named Lyuze.
#5 - The Glass Cradle
Season 1 - Episode 17
Casshern and the others meet a trio of robotic kids. Ringo makes friends with one of them, a mute robot named Holter. When the three kids go back to their home, which is the facility, they bump into Dio and Leda, where she pretends to be nice to them in order to glean information on Luna and her creator. Leda attacks the kids upon seeing the glass tanks where Luna was said to be born, Casshern fights her. Just as Leda was about to critically injure Casshern, Dio appears and reminds her that he should be the one to kill Casshern and not her.
#6 - The World is Filled with the Voices of Death
Season 1 - Episode 2
Casshern meets up with a robotic couple and their dog named Friender. He finds out that they reside with a total of 10 robots, seeking to live in peace until they die. The robots turn on Casshern, and attempt to eat him to survive, being tempted by his completely un-decomposed body. Casshern is forced to defend himself, nearly killing them all.
#7 - The Woman of the High Tower
Season 1 - Episode 7
Casshern visits a dilapidated factory, with an incompleted high tower atop it. Far from abandoned, there are construction robots who live day-to-day activities by playing card games and work on finishing the tower's construction. The leader, a female robot named Lizabel, explains to Casshern that she created a purpose to live for these robots by having them build a tower. Once it is completed, she plans to attach a bell to it. She believes that by ringing the bell, the people of the land can still feel that the world is beautiful and filled with hope. She leads Casshern into a trap, when she notices his perfect and unruined body. Insanity takes over her as Lizabel plans to use Casshern's body as material for her bell. She is aghast to learn that Casshern was the one who killed Luna, and promptly releases him. She goes ahead and creates a bell out of another material and attaches it to the completed tower. But when the bell is rung, the construction robots are irritated from the sound and turn on Lizabel. Casshern saves Lizabel, and says that even though the sound of the bell sounded horrid, he was pleased by it, since it reminded him of hope. When Casshern leaves Ringo and Ohji visit the factory and talk with Lizabel who has renewed faith in life.
#8 - Towards the Blossoming Flowers
Season 1 - Episode 24
Lyuze, Ringo, Ohji and Casshern live peacefully somewhere and raise flowers. Lyuze realizes that this is what she always longed for. Meanwhile Luna heals some of the arriving Robots while Breaking Boss watches from the sidelines. Luna is disgusted by death, and refuses to heal those who have signs of ruin on them. Lyuze time has come, and she dies in Cassherns arms. Ohji also fades away and Casshern and Ringo burry them. Casshern pays one last visit to Luna, facing off against Breaking Boss on the way. Upon reaching a terrified Luna, he tells her to continue to heal, but never again forget death and what it means. Before leaving he warns her that, should she ever forget, he would return. Finally Ringo, now an adult living in a field of flowers, tells that Casshern never had to return.
#9 - The Man Who Killed the Sun Named Moon
Season 1 - Episode 5
Lyuze appears before Casshern again, who proceeds to condemn him with Luna's death. Luna was dubbed the "Source of Life" for this world. Long ago in the past, Lyuze's sister Liza was tasked to protect Luna, but was slaughtered along with Luna by Casshern. Before dying, Liza tells her sister about Casshern and makes her promise to take revenge on him. Lyuze attacks Casshern, but his flesh is able to regenerate, thus rendering her attacks useless. Casshern almost kills Lyuze in his berserk mode, but manages to take control of himself and flees. Meanwhile, Ringo and Ohji trade usable parts to robots who are in need of them. A robot attacks and steals the parts from them. Casshern arrives to stop it, but again loses control and kills several unrelated robots. He only stops when he sees Ringo, who is still terrified of him. Before anyone can react, an unknown person appears before them.
#10 - The Flower Which Blooms in the Valley of Ruin
Season 1 - Episode 9
Casshern battles a horde of robots and was pushed off a cliff then fell into a hole in the ground. There, he finds a little mentally depleted robot girl who tends to his wounds and gave him flowers. It is revealed with the arrival of Ringo, Ohji and Lyuze that the place was in fact a graveyard for robots. The girl's name was Nico and used to be the servant of Luna. Not long after, robots which survived the fall starts to attack. As Casshern and Lyuze fights them off, Nico was unfortunately killed during the raid protecting a doll made of scraps which she still perceives to be Luna. Following the last words of the robot name Bolton, Casshern and the crew now travels the land to find Luna who hopefully is still alive to undo the ruination.
#11 - Making Living Time into Color
Season 1 - Episode 12
Casshern and Friender arrive at a city that is surrounded by a lake, which is populated with robots who have already accepted death. Casshern meets a disabled robot, Margo, who considers himself as an artist and paints white colors around the city. However, the current leader of the robots is far from pleased with Margo's optimistic behavior, and considers his presence to be corrupting to his fellow robots who have accepted ruin.
#12 - Paradise of Despair
Season 1 - Episode 21
Luna tells Casshern's group that her blood can grant eternal life, but her outlook on death has changed negatively, completely shunning it. She wants them to stay but Casshern and the others leave. Later Casshern changes his mind and wants to bring Ringo for Luna to heal, against Lyuze's protests. They reunite with Ohji, who tells them that Luna is not salvation; she grants death. A long time ago, humans found a way to live eternally, but Braiking Boss found it revolting and started exterminating humans, eventually giving the order to assassinate Luna. Ohji explains that the old Luna and the current Luna are different. However, upon witnessing Luna's results, Ohji forces Ringo to see Luna, but the girl refuses. Casshern reaches Dio and Leda's army who has come to get rid of Luna, but he allows himself to be brutally attacked by them.