11. Be All My Sins Remember'd

Complete story — includes the ending

Following the discovery of the location of all the Replicator ships in the galaxy, the Daedalus and the Apollo are sent to Atlantis to attack them. Attacks by the two battlecruisers and their new Asgard weapons force the Replicators to flee to their homeworld. McKay is able to come up with a plan to use a Replicator he has created to turn the other Replicators into a harmless mass. Needing more ships, the team and Todd work to recruit the Wraith to the battle, getting seven hive ships. Larrin of the Travelers arrives after the meeting and Sheppard is able to get her to add six more ships to the fleet, including the Travelers' Ancient warship. After modifying their plan due to input from McKay's Replicator, FRAN, the allied fleet attacks the Replicator homeworld. McKay's plan works, but the final phase, detonating the Replicator ZPMs to implode the mass, fails. Carter and McKay realize that the mass can be made to sink to the planet's core where the heat and pressure will implode it. As the surviving ships flee, the planet explodes and the Replicators are destroyed. However, a single Replicator warship is seen prowling the debris commanded by Doctor Elizabeth Weir who is pleased that they can finally get on with their plan without worrying about the other Replicators.