The second and final season of the Code Geass anime series, titled Code Geass: Lelouch of the Rebellion R2 (Japanese: コードギアス 反逆のルルーシュ R2, Hepburn: Kōdo Giasu: Hangyaku no Rurūshu R2), is produced by Sunrise, Mainichi Broadcasting System, and Project Geass.^[1] The series was directed by Gorō Taniguchi who has also worked with Ichirō Ōkouchi on the script. The characters were conceived by Clamp and designed by Takahiro Kimura.^[1] R2 takes place a year after the events of the first series. The coup d'état by the Black Knights, led by the protagonist, Lelouch vi Britannia, ended in failure and resulted in Lelouch's capture and brainwashing. Since then, the coup has been referred to as the Black Rebellion.

R2 was first announced in the April 2007 edition of Newtype.^[2] Early screening for the first episode was held in March 2008 in Tokyo Dome City and Osaka Mido Hall.^[3] The series premiered on April 6, 2008 on MBS TV and Tokyo Broadcasting System Television; it was later broadcast on sixteen other stations.^[4] The third episode was partly leaked four days before its intended air date due to human error.^[5][6] The final episode aired on September 28, 2008.^[7] Bandai Visual encapsulated the series into nine volumes in DVD, Blu-ray, and Universal Media Disc formats;^[8][9][10] each volume contained a picture drama episode as a bonus. Bandai Visual later released a singular adaption of the series called Zero Requiem, and later released the series in a box collection.^[11][12]

The first episode premiered on Adult Swim on November 2, 2008, a week after the final episode of the first series was aired.^[13][14] Adult Swim restarted R2 in a new time slot by re-airing the first episode the week after and aired the final episode on June 7, 2009.^[13][15] Bandai Entertainment released the series in four DVD volumes and a DVD box between August 2009 and February 2012.^[16][17] During the 2013 Otakon, Funimation announced its acquisition of the series.^[18] In the United Kingdom, Kazé released the series as a DVD and Blu-ray box collection.^[19][20] In Australasia, Madman Entertainment released a single volume and a DVD and Blu-ray box collection.^[21][22] In anticipation for the DVD volume release, Madman streamed the episodes on a weekly basis beginning on October 27, 2009.^[23]

The episodes use four pieces of theme music: two opening and two ending themes.^[24] The opening and ending themes for the first 12 episodes are "O2" (O2〜オー･ツー〜, Ō Tsū) and "Shiawase Neiro" (シアワセネイロ, lit. "Happy Timbre") respectively and were both performed by Orange Range. For the rest of the season, the opening theme is "World End" performed by Flow and the ending theme is "Waga Rōtashi Aku no Hana" (わが﨟たし悪の華, lit. "My Beautifully Elegant Flower of Evil") performed by Ali Project.^[24]

For the 15th anniversary rebroadcast edition, the opening theme for the first twelve episodes is "Face2" by Lozareena and the ending theme is "Mushoku Tōmei" (無色透明, lit. "Colorless and Transparent") by Yūtarō Yamashita. For the rest of the season, the opening theme is "Daydream Believer" by Flow and Orange Range, and the ending theme is "Z.E.R.O." by Blue Encount.