Fangs of the Enemy
Kira and Cagalli are sent into a nearby ZAFT controlled city to gather supplies with Natarle and the Desert Dawn. The two teenagers get caught in an attack by the Blue Cosmos, and when Kira saves a man who happens to be Andrew Waltfeld, they are invited to the ZAFT base. There, Andrew reveals that he knows Kira is the pilot of the Strike and a Coordinator, but lets them leave safely.
Aired 08/02/2003EP 19 - Fangs of the Enemy

Mobile Suit Gundam Seed
C.E. 71: In the midst of war between the Naturals (OMNI) and Coordinators (ZAFT), a unit from ZAFT is dispatched to hijack the Earth Alliance's newly developed mobile suits on the neutral colony of Heliopolis. Orb Civilian Coordinator Kira Yamato attends the technical college on Heliopolis. After ZAFT hijacks 4 of the 5 mobile suits, Kira stumbles upon the last one, Strike, forced to pilot it to save his and his friend's lives. During this confusion, Kira also reunites with his childhood Coordinator friend, Athrun Zala, who ironically turns out to be a ZAFT soldier and one of the hijackers at Heliopolis. Having control of Strike, Kira joins the Earth Alliance boarding the ship known as Archangel, to protect his friends while despairing over becoming the enemy of his childhood friend and people.
Note: An HD remaster was broadcasting starting on December 23, 2011 with two recap episodes cut, including new and updated animation, conversion to 16:9, and updated music.