Damage

A strong and particularly violent mental patient named Dana, who had been tortured by a serial killer as a kid, breaks out of the asylum, killing several of the staff in the process. Angel (alerted to this breakout by a whistleblower who hopes to join Wolfram & Hart), and Spike (on a mission from Lindsey, pretending to represent the Powers That Be) both seek out this dangerous woman. Spike tracks Dana in a deserted building but is kicked out of a window before he can capture her. Angel arrives and informs him that Dana is, in fact, a psychotic vampire slayer. Angel calls the Watcher's Council for assistance in recovering Dana. The Watchers' Council liaison, Andrew, assists Spike in searching for Dana. Andrew agrees, at Spike's request, to keep Spike's resurrection a secret from Buffy. However, Dana captures Spike, tortures him, and cuts his hands off. Andrew returns to Wolfram & Hart for help, and Angel Investigations rescues Spike and captures Dana. However, Angel is forced to hand Dana over to Andrew after several Slayers arrive to take possession of her. It is revealed that the Watcher's Council, and Buffy in particular, no longer considers Angel and his companions trustworthy due to their involvement with Wolfram and Hart. Spike gets his hands stitched back on, and he and Angel discuss the nature of the evil in themselves.

Quotes and trivia
In this episode we learn that it has been 6 months since the events of "Chosen" have transpired. We also learn that there are generally hundreds to thousands of Potential Slayers to a generation in the world. We also learn what happened to various characters after the events of "Chosen."