Buffy and the original Scoobies finally manage to find out that Adam is hiding at one of the Initiative's secret labs. Buffy figures out that Spike has deceived them and reunites with the original gang. They decide to finish this themselves without the help of Anya or Tara. After a disappointing idea by Xander, Giles comes up with a plan as he figures out a way to make Xander's idea work. Buffy, Xander, Giles, and Willow find a way into the Initiative, and stop at a room near area 314, where Adam and his people hide planning to build and release an army of hybrid cyborg monsters. Buffy leaves through a secret door while the rest prepare a spell the significance of which is still not clear.
Buffy finds Riley and leaves him fighting Forrest, now turned into a killer cyborg demonoid. Then she goes on to tackle Adam. Things don't look good for her at first, but then the significance of the spell is made clear: Giles, Willow and Xander invoke the powers of the primeval slayer to be joined with her into Buffy's body so they can defeat Adam together. After an intense fight in which she's able to use powers like creating an invisible wall to protect her from bullets and turning a small missile into doves, the combined Buffy easily rips the uranium nucleus out of Adam's chest which kills him. After this, she falls down in the arms of a surprised Riley, who arrives just in time to hold her. Giving all of their strength and power to Buffy leaves the rest of the gang totally exhausted and vulnerable as a demon breaks through, but Spike kills it. Buffy, Riley, Xander, Giles, and Willow team up together with the Initiative's soldiers to stop the demon attacks saving most of them with only 40% casualties amongst the Initiative. The government decides to shut down the Initiative for good after this and fill up the base with concrete, which is the last time the Initiative base in Sunnydale is heard from until Season 7's The Killer in M