Setsuna and Tieria face off against Ali Al-Saachez's Arche Gundam, but are sorely outmatched until Allelujah and Lockon arrive and drive off the Arche. Lockon learns the circumstances behind his brother's death, including Setsuna's involvement, and his motivations for fighting for Celestial Being, deciding to leave the past behind him. The A-Laws attempt to intercept the Ptolemaios II's return to space; the Ptolemaios' success forces Commander Homer Katagiri to accept the help of the Innovators to prevent any more sacrifices. Kati's message to Celestial Being expressing respect for Leesa Kujo's tactics results in Sumeragi realizing that Kati is a member of the A-Laws and aware that Sumeragi is Celestial Being's tactical forecaster.
"Unerasable Past"
Gundam 00 Season 2 Episode 10 will air on Sunday, December 7, 2008 in Japan. The next episode title "Heavenly Light" will be posted here as soon as it becomes available online.