Season 01
Lelouch takes on a secret identity called Zero, to save his friend Suzaku.
All Episodes - S01
EPS01
Lelouch Lamperouge, a Britannian student, accidentally gets involved with a group of terrorists. He meets a mysterious woman who gives him the powers of Geass, the Power of Kings.
EPS02
While Lelouch comes to realize his new power, using it and his superior strategic abilities to help the terrorists in their attack. The White Knight arrives, and ruins his plans.
EPS05
Lelouch is reunited with C.C., the strange girl who granted him the power of Geass. Since Zero confessed to Clovis' murder, Suzaku is acquitted of all charges. He meets Princess Euphemia, who has him guide her around Area 11.
EPS06
Suzaku joins Lelouch's class and faces the prejudice of the Britannian students. Arthur, a stray cat, steals Lelouch's Zero mask. Milly Ashford, believing that Arthur carries an embarrassing secret, has the whole school out looking for him. Written by Princess Tarah
EPS10
Zero's Black Knights are becoming a rallying point for Japanese, and they receive gifts from the main underground Japanese forces. Zero once again inserts his forces into battle, with the intention of capturing Cornelia.
EPS11
Zero manages to destroy most of Cornelia's units and the superior technology of Kallen's Knighmare is enough to take on the White Knight, who saves Cornelia. Lelouch is pursued by the White Knight.
EPS12
Shirly plucks up the courage to ask Lelouch out. Lelouch assumes the identity of Zero and goes to meet the main figures in the Japanese rebellion, wanting to gain their support.
EPS13
Lelouch has doubts about his actions, as they caused the death of Shirly's father. Viletta reveals to Shirly that she believes that Lelouch is involved with the Black Knights, those responsible for her father's death.
EPS14
Lelouch is scattered as he can not remember what happened when he was unconscious. Shirly found out that he is Zero. Mao reveals his presence. He also has the power of Geass.
EPS16
Lelouch's sister Nunnally is kidnapped by Mao. Suzaku and Lelouch work together to save her, while Lelouch tries to keep Geass, and Zero, a secret.
EPS17
An inauguration ceremony is held for Clovis' memorial art museum, with Euphemia judging the art contest. Lelouch helps Kyoshiro Tohdoh's comrades rescue their leader.
EPS18
Lelouch now knows the identity of the White Knight as his friend, Suzaku, who is officially named Princess Euphemia's Knight. Lelouch draws Suzaku into a trap.
EPS19
Lelouch, Euphemia, Suzaku and Kallen find themselves on a mysterious Island. Euphemia knows that Zero's true identity, Lelouch, is her brother. Suzaku finds out that Kallen is the pilot of Guren.
EPS20
Using the Lancelot, Britannia fights back against the Kyushu invaders. Nina meets Princess Euphemia and inadvertently gives her peace of mind about Suzaku. Lelouch reveals his plan of making Tokyo an independent nation to the Black Knights. Written by Princess Tarah
EPS22
Lelouch must decide whether to accept Euphy's terms of peace. His motives for destroying Britannia is to create a peaceful world for his sister Nunnally, but he also recognizes his want for revenge.
EPS23
Lelouch's accidental Geass on Euphemia destroys any hope of peace, and Suzaku, enraged at what Zero has done, sets out with revenge in mind. V.V reveals Zero's secret of Geass to Suzaku.
EPS25
After using his Geass on Cornelia, Lelouch discovers that she doesn't know who killed his mother. C.C. senses that Nunnally has been kidnapped, and Lelouch abandons the Black Knights to rescue her.