S2 E20
Stargate Universe (2009)
The previously unknown purpose of the "Ninth Chevron" is revealed, and ends up taking a team to an Ancient ship "Destiny", a ship built millions of years ago by the Ancients, used to seed distant galaxies with
S10 E20
Stargate SG-1 (1997)
General Hammond summons Colonel Jack O'Neill out of retirement to embark on a secret rescue mission. O'Neill confesses that he disobeyed orders to destroy the Stargate on Planet Abydos, and that scientist Daniel Jackson may still
Stargate: The Ark of Truth (2008)
SG-1 searches for an ancient weapon which could help them defeat the Ori, and discover it may be in the Ori's own home galaxy. As the Ori prepare to send ships through to the Milky Way to attack Earth, SG-1 travels to the Ori galaxy